taxonID	type	description	language	source
038C87E56670FFE50FC3093BFCF1FC32.taxon	description	Fig. 2 A – G	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56670FFE50FC3093BFCF1FC32.taxon	materials_examined	Type locality. Brazil. Material examined. WesternAustralia: Cowrie Creek, Bidyadanga, 18 ° 32 ′ 23.82 ″ S 121 ° 46 ′ 09.91 ″ E, 4 November 2020, 2 specimens (WAM V 11616). Cape Bosut, Bidyadanga, 18 ° 42 ′ 4.99 ″ S 121 ° 37 ′ 34.11 ″ E, 3 November 2020, 2 specimens (WAM V 11617). Cape Keraudren, 19 ° 57 ′ 52.62 ″ S 119 ° 46 ′ 54.44 ″ E, 5 November 2020, 2 specimens (WAM V 11618). Cemetery Beach, Port Hedland, 20 ° 18 ′ 21.44 ″ S 118 ° 36 ′ 40.39 ″ E, 2 November 2020, 1 specimen (WAM V 11619). Five Finger Reef, Ningaloo, 23 ° 11 ′ 24.36 ″ S 113 ° 46 ′ 24.35 ″ E, 19 September 2020, 4 specimens (WAM V 11620). Gnaraloo, 23 ° 46 ′ 21.83 ″ S 113 ° 32 ′ 9.24 ″ E, 22 September 2020, 2 specimens (WAM V 11621). Coral Bay, Ningaloo, 23 ° 9 ′ 16.27 ″ S 113 ° 46 ′ 4.40 ″ E, 26 July 2016, 1 specimen (WAM V 11622).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56670FFE50FC3093BFCF1FC32.taxon	description	Description. Incomplete specimens with 15 – 61 chaetigers, posterior end missing, remaining body 3.0 – 19.4 mm long and 0.6 – 1.0 mm wide; cream yellow or reddish brown in alcohol. Dark brown pigment present on prostomium and tentacular segments, thin dark brown bands present on few anterior chaetigers. Prostomium wider than long, with antero-medial incision. Eyes two pairs, equal size, in trapezoidal arrangement. Palps one pair, palpophores tubular, palpostyles subconical. Antennae one pair, as long as palps. Tentacular cirri four pairs with basal articulation, longest ones extending to chaetiger 8 – 16. Pharyngeal jaws reddish brown or translucent in small specimens, curved at tips, with nine teeth on each jaw. Paragnaths reddish black, present on maxillary ring only, arranged as follows: Area I = 0, Area II = 6 – 13 cones in an oblique oval, Area III = 8 – 14 cones in a circle, Area IV = 12 – 24 cones in a circle, Area V = 0, Area VI = 0 (1 rounded papilla in some specimens), Areas VII – VIII = 0 (Fig. 2 A – B). Apodous segment as long as first chaetiger. First two chaetigers uniramous. Notopodia present with digitiform dorsal and ventral ligules, dorsal ligules about half as long as ventral ligules in middle chaetigers and much smaller in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia in anterior chaetigers, nearer to distal edge of dorsal parapodia in posterior chaetigers, about five times longer than ventral ligules, similar length throughout chaetigers. Neuropodia with digitiform ventral ligules, acicular ligules, and triangular postchaetal lobes extending to same level of acicular ligule tips. Ventral cirri cirriform, attached basally on ventral parapodia, slightly longer than ventral ligules, similar length throughout chaetigers (Fig. 2 C). Notochaetae present with homogomph spinigers in anterior chaetigers, sesquigomph falcigers from chaetiger 13 – 19 (Fig. 2 D). Notopodial falcigerous blades long, slightly curved, bidentate (with a small distal tooth), with fine serrations, serrations longer towards tips. Neurochaetae present with heterogomph falcigers (Fig. 2 E) and homogomph spinigers (Fig. 2 F) in dorsal fascicles; falcigerous blades long, slightly curved, bidentate with fine serrations, serrations longer towards tips. Neurochaetae also present with heterogomph spinigers (Fig. 2 G) and falcigers (Fig. 2 H) in ventral fascicles; falcigerous blades long, slightly curved, unidentate (without a small distal tooth), with fine serrations, serrations longer towards tips. All spinigerous blades long, with fine serrations. Acicula translucent.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56670FFE50FC3093BFCF1FC32.taxon	discussion	Remarks. Our specimens differ from Ceratonereis mirabilis from South Australia, Mozambique, Madagascar, Japan, and Brazil. Ceratonereis mirabilis from South Australia has more elongate conical paragnaths in some specimens, digitiform prechaetal lobes in dorsal neuropodial ligules, and heterogomoph spinigers in the dorsal fascicles of the neuropodia (Hutchings & Turvey 1982). Ceratonereis mirabilis from Mozambique and Madagascar has minutely papillated dorsum in posterior segments (Day 1967). Ceratonereis mirabilis from Japan has unidentate falcigers in noto- and neuropodia of some specimens (Imajima 1972). Ceratonereis mirabilis from Brazil has fewer teeth on each jaw (7) and heterogomph spinigers in the dorsal fascicles of the neuropodia (Conde-Vela 2021). The degree of variation in C. mirabilis is highly suggestive of a species complex. Assessing specimens using molecular and morphological evidence of atokes and epitokes across the oceans: Indian Ocean (Mozambique, Madagascar, and Western Australia), and Southern Ocean (South Australia), Pacific (Japan), and Atlantic (Brazil) will be required to establish the possible presence of additional species. Ceratonereis species from Western Australia, i. e., Ceratonereis (Ceratonereis) perkinsi Hartmann-Schröder, 1985; Ceratonereis singularis australis HartmannSchröder, 1985; Ceratonereis (Ceratonereis) longiceratophora Hartmann-Schröder, 1985; and Ceratonereis tentaculata Kinberg, 1865, differ from the present material. Ceratonereis perkinsi and C. singularis australis have unidentate falcigers in notopodia, instead of bidentate falcigers for C. mirabilis. Ceratonereis longiceratophora has only bidentate falcigers in ventral fascicles of neuropodia, instead of both unidentate and bidentate falcigers or only unidentate falcigers for C. mirabilis. Ceratonereis tentaculata has longer dorsal notopodial ligules than those of C. mirabilis.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56670FFE50FC3093BFCF1FC32.taxon	distribution	Distribution. Indo-Pacific Ocean: Red Sea, Australia, Japan, Galapagos Islands; and the western Atlantic Ocean: Brazil, Gulf of Mexico (Table 2). Habitat. Intertidal, subtidal, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFE40FC30BC7FCB8FC50.taxon	description	Fig. 3 A	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFE40FC30BC7FCB8FC50.taxon	materials_examined	Type locality. Gantheaume Point, Broome, Western Australia. Material examined. Western Australia: Cooke Point, Port Hedland, 20 ° 18 ′ 9.71 ″ S 118 ° 38 ′ 21.00 ″ E, 1 November 2020, 1 specimen (WAM V 11623).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFE40FC30BC7FCB8FC50.taxon	description	Description. A complete specimen with 17 chaetigers, body 1.7 mm long and 0.2 mm wide; cream yellow in alcohol. Prostomium longer than wide. Eyes reddish black, two pairs, in trapezoidal arrangement, outer ones longer. Palps minute, simple, directed ventrally. Antennae absent. Tentacular cirri four pairs, smooth, longest one extending to chaetiger 3. Apodous segment reduced. First chaetiger uniramous. Notopodia and neuropodia widely separated, comprising a single lobe each, subtriangular distally. Dorsal and ventral cirri cirriform, attached near edge of parapodia, similar length throughout all chaetigers. Small accessory cirri present on ventral side of notopodia and dorsal side of neuropodia. Notochaetae and neurochaetae present with homogomph spinigers, shafts with weak septa (Fig. 3 A). All spinigerous blades long, with fine serrations. Pygidium present with very short anal cirri.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFE40FC30BC7FCB8FC50.taxon	discussion	Remarks. This specimen is juvenile, and therefore the identification is tentative. The adult species consist of 20 – 22 chaetigers (Paxton 1983). Accessory parapodial cirri are absent in females (Hartmann-Schröder 1979).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFE40FC30BC7FCB8FC50.taxon	distribution	Distribution. Australia: Western Australia, Queensland, New South Wales; Egypt: Port Said (Table 2). Habitat. Intertidal, 2 - 18 m, rocky shores, sand (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFEB0FC30F64FD58FF66.taxon	description	Fig. 3 B – E	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFEB0FC30F64FD58FF66.taxon	materials_examined	Type locality. Sellicks Beach, South Australia. Material examined. Western Australia: Cosy Corner Beach, 34 ° 15 ′ 25.83 ″ S 115 ° 1 ′ 43.23 ″ E, 14 December 2020, 1 specimen (WAM V 11624).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFEB0FC30F64FD58FF66.taxon	description	Description. A complete specimen with 24 chaetigers, body 4.5 mm long and 0.5 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, equal size, in trapezoidal arrangement. Palps minute, simple, directed ventrally. Antennae absent. Tentacular cirri four pairs, smooth, longest one extends to chaetiger 3 (Fig. 3 B). Apodous segment reduced. First chaetiger uniramous. Notopodia and neuropodia widely separated, comprising a single lobe each, subtriangular distally. Dorsal and ventral cirri cirriform, attached subdistally and basally, respectively, on parapodia, both similar length throughout chaetigers. Accessory parapodial cirri absent (Fig. 3 C). Notochaetae and neurochaetae present with homogomph spinigers, shafts without septa. Spinigerous blades long, smooth, with fine tips (Fig. 3 D) and some with sub-spherical caps (Fig. 3 E). Pygidium present with short anal cirri, conical, as long as last chaetiger.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFEB0FC30F64FD58FF66.taxon	discussion	Remarks. This specimen is juvenile. The adult species have 27 chaetigers (Paxton 1983). Micronereis halei has accessory parapodial cirri on the ventral side of the notopodia and the dorsal side of the neuropodia (Hartman 1954), but we and Hartmann-Schröder (1983; 1986) cannot find those cirri perhaps due to them being juvenile specimens (Paxton 1983) or females (Hartmann-Schröder 1983). In our specimen and materials examined by Hartman (1954), spinigers are smooth, instead of serrated (Hartmann-Schröder 1983). Chaetae may also consist of homogomph falcigers (Paxton 1983), but we agree that those are modified homogomph spinigers with sub-spherical caps (Fig. 3 E) as also observed by Hutchings & Turvey (1982).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56672FFEB0FC30F64FD58FF66.taxon	distribution	Distribution. Temperate Australia: South-West Australia, South Australia, Victoria (Table 2). Habitat. Intertidal, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667DFFE90FC30D1CFC58FD36.taxon	description	Figs 4 A – F, 19 A – B	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667DFFE90FC30D1CFC58FD36.taxon	materials_examined	Type locality. New Zealand. Material examined. Western Australia: Dynamite Bay, Green Head, 30 ° 4 ′ 15.62 ″ S 114 ° 57 ′ 44.93 ″ E, 28 December 2020, 2 (WAM V 11625). Cape Peron, 32 ° 15 ′ 59.14 ″ S 115 ° 41 ′ 6.74 ″ E, 12 January 2021, 2 specimens (WAM V 11626). Comparative material. Neanthes cricognatha, det. C. Glasby, Bandy Creek Jetty, Esperance, Western Australia, 33 ° 51 ′ S 121 ° 55 ′ E, 1 (NTM W 18357), coll. Mulligan, 17 March 2002.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667DFFE90FC30D1CFC58FD36.taxon	description	Description. Incomplete specimens with 20 – 28 chaetigers, posterior end missing, remaining body 3.4 – 5.7 mm long and 0.6 – 1.0 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, equal sizes, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, shorter than palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 6 – 7 (Fig. 4 A). Pharyngeal jaws reddish black, curved at tips, with eight teeth on each jaw. Paragnaths reddish to black, conical, present on both maxillary and oral rings, arranged as follows: Area I = 5 – 6, Area II = 32 – 33 in a triangle, Area III = 30 in an ellipse, Area IV = 33 – 36 in a triangle, Areas V – VIII = a continuous band of paragnaths about 2 – 5 deep dorsally, 4 – 5 deep ventrally (Fig. 4 B – C). Apodous segment as long as first chaetiger. All chaetigers biramous. Notopodia present with triangular dorsal ligules, digitiform intermediate and inferior ligules. Dorsal cirri cirriform, attached on lower-middle of dorsal parapodia, as long as dorsal ligules, similar length throughout chaetigers. Neuropodia with digitiform ventral ligules, acicular ligules, and subconical postchaetal lobes extending well beyond acicular ligule tips. Ventral cirri cirriform, attached basally on ventral parapodia, shorter than ventral ligules, similar length throughout chaetigers (Fig. 4 D). Notochaetae present with homogomph spinigers (Fig. 4 E). Neurochaetae present with homogomph spinigers and heterogomph falcigers (Fig. 4 F) in both dorsal and ventral fascicles. Spinigerous blades long, with fine serrations. Falcigerous blades long, with fine serrations, and a small, hooked tooth. Acicula translucent.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667DFFE90FC30D1CFC58FD36.taxon	discussion	Remarks. Pettibone (1963) and Imajima (1972) synonymized N. cricognatha with N. caudata (delle Chiaje, 1828) and N. arenaceodentata (Moore, 1903); the two latter species were assigned to N. acuminata (Ehlers, 1868) by Day (1973). However, we are following the more recent studies that have used the name N. cricognatha for Australian specimens (Hutchings & Turvey 1982; Wilson 1984; Glasby 2015). The dorsal cirri of our specimens are longer and attached more basally than that of materials identified as Nereis (Neanthes) arenaceodonta from Massachusetts, Rhode Island, New Jersey, and Maryland, USA (Pettibone 1963). In addition, the falcigers of our specimens have a hooked distal tooth (Fig. 4 F), while those of N. caudata from Japan have a blunt tip (Imajima 1972). A recent molecular study has found that N. caudata, N. arenaceodentata, and N. acuminata show multiple evolutionary significant units although they are identical in terms of paragnath distribution and parapodial characteristics (Reish et al. 2014). In our study specimens, Area I has fewer paragnaths than that reported by Augener (1913), Hutchings & Rainer (1979), Hutchings & Turvey (1982), and Wilson (1984) and seen in the comparative material from Esperance, Western Australia, which has 12 paragnaths (Fig. 19 A); the comparative specimen also has many more paragnaths in Areas VII – VIII (Fig. 19 B). In addition, all chaetigers are biramous, instead of uniramous for first two chaetigers (Ehlers 1904). Possibly, it represents an undescribed species, but more specimens are required to establish the extent of size-dependent variation in paragnath number.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667DFFE90FC30D1CFC58FD36.taxon	distribution	Distribution. Indo-West Pacific: India, Philippine, Australia, New Zealand (Table 2). Habitat. Intertidal, subtidal, soft bottoms, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667FFFE80FC30986FCF1F885.taxon	description	Figs 5 A – H, 19 C – D	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667FFFE80FC30986FCF1F885.taxon	materials_examined	Type locality. Gulf of Mannar, Sri Lanka. Material examined. Western Australia: Cowrie Creek, Bidyadanga, 18 ° 32 ′ 23.82 ″ S 121 ° 46 ′ 09.91 ″ E, 4 November 2020, 1 specimen (WAM V 11627). Cape Keraudren, 19 ° 57 ′ 46.76 ″ S 119 ° 46 ′ 58.51 ″ E, 5 November 2020, 1 specimen (WAM V 11628). Cemetery Beach, Port Hedland, 20 ° 18 ′ 21.44 ″ S 118 ° 36 ′ 40.39 ″ E, 2 November 2020, 2 specimens (WAM V 11629). Comparative material. Neanthes unifasciata, det. C. Glasby, Field Island, Kakadu National Park, Northern Territory, 12 ° 3.431 ′ S 132 ° 24.557 ′ E, 1 (NTM W 19021), coll. C. J. Glasby & S. K. Horner, 19 August 2004.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667FFFE80FC30986FCF1F885.taxon	description	Description. A complete specimen with 78 chaetigers, body 20.1 mm long and 0.7 mm wide; cream yellow in alcohol. Incomplete specimens with 28 – 61 chaetigers, posterior end missing, remaining body 7.2 – 15.3 mm long and 0.8 – 1.4 mm wide; light green or cream yellow in alcohol. Dark green or brown bands present on posterior half of chaetiger 2, gradually disappearing towards chaetiger 11 – 12. Prostomium longer than wide. Eyes black, two pairs, equal sizes, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, shorter than palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 6 (Fig. 5 A). Pharyngeal jaws reddish brown, curved at tips, with 11 teeth on each jaw. Paragnaths reddish black, conical, present on both maxillary and oral rings, arranged as follows: Area I = 0 – 1, Area II = 10 – 16 in two curved rows, Area III = 8 in two rows, Area IV = 20 – 22 in curved rows, Area V = 0, Area VI = 6 – 8, small, in two rows, Areas VII – VIII = 9 – 10 in one row (Fig. 5 B). Apodous segment as long as first chaetiger. First chaetiger uniramous. Notopodia present with digitiform dorsal and ventral ligules throughout chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, about twice longer than dorsal ligules, similar length throughout chaetigers. Neuropodia with digitiform ventral ligules, acicular ligules, and conical postchaetal lobes extending well beyond acicular ligule tips. Ventral cirri cirriform, attached basally on ventral parapodia, shorter than ventral ligules, similar length throughout all chaetigers (Fig. 5 C). Notochaetae present with homogomph spinigers. Neurochaetae present with heterogomph falcigers and homogomph spinigers (Fig. 5 D) in dorsal fascicles and heterogomph falcigers (Fig. 5 E, 5 G) and spinigers (Fig. 5 F) in ventral fascicles. Spinigerous blades short, with fine serrations. Falcigerous blades medium size, slightly curved, with a small hook at tip and subdistal tendon (only visible in Fig. 5 G). Acicula translucent. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last three chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667FFFE80FC30986FCF1F885.taxon	discussion	Remarks. In our specimens, Area III has fewer paragnaths than that of epitokous specimens from Indonesia (22 – 25 cones) (Pamungkas & Glasby 2015) and those paragnaths are arranged in two rows, instead of three in specimens from southern India (Fauvel 1932, 1953). Paragnaths on Areas VII – VIII can also be arranged in two rows in specimens from Kuwait (Mohammad 1973). In the original description, neurochaetae in the ventral fascicles consist of heterogomph falcigers and hemigomph (incomplete heterogomph) spinigers (Willey 1905) but those spinigers were described as heterogomph by Ehlers (1918). Other studies did not describe the composition of neurochaetae (Fauvel 1932, 1953; Day 1967; Mohammad 1973; Pamungkas & Glasby 2015). The comparative material from Northern Territory matched closely the Western Australian material, except that the antennae extended beyond the palps in the Northern Territory material (Fig. 19 C – D). The chaetae of the comparative material, imaged under a 60 x plan apochromatic objective lens, revealed fine serrations on the heterogomph falcigers (Fig. 5 H), which are difficult to see under lower magnifications.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667FFFE80FC30986FCF1F885.taxon	distribution	Distribution. Tropical Indo-West Pacific; in Australia confirmed that the species occurs from Cape Keraudren, Western Australia to Kakadu, Northern Territory (Table 2). Habitat. Intertidal, subtidal, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56679FFEE0FC30BC7FC4CFB76.taxon	description	Fig. 6 A – G	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56679FFEE0FC30BC7FC4CFB76.taxon	materials_examined	Type locality. Speeds Point, near Streaky Bay, South Australia. Material examined. Western Australia: False Cape Bosut, Bidyadanga, 18 ° 34 ′ 18.40 ″ S 121 ° 43 ′ 42.87 ″ E, 3 November 2020, 1 specimen (WAM V 11630). Yardie Creek, Ningaloo, 22 ° 19 ′ 35.90 ″ S 113 ° 48 ′ 33.70 ″ E, 24 September 2020, 3 specimens (WAM V 11631). Three Mile, 23 ° 52 ′ 32.41 ″ S 113 ° 29 ′ 38.72 ″ E, 23 September 2020, 2 specimens (WAM V 11632).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56679FFEE0FC30BC7FC4CFB76.taxon	description	Description. Complete specimens with 45 – 52 chaetigers, body 6.5 – 10.5 mm long and 0.4 – 0.8 mm wide; cream yellow in alcohol. Incomplete specimens with 31 – 47 chaetigers, posterior end missing, remaining body 6.0 – 12.7 mm long and 0.5 – 0.7 mm wide; cream yellow to reddish brown in alcohol. Prostomium as long as wide. Eyes black, two pairs, outer ones slightly larger, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, extending to level of palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 2 – 3. Pharyngeal jaws yellow translucent, curved at tips, with eight teeth on each jaw. Paragnaths reddish to black, conical, present on both maxillary and oral rings, arranged as follows: Area I = 0, Area II = 1, Area III = 0, Area IV = 2 – 4 in one row, Area V = 0, Area VI = 0, Areas VII – VIII = 2 – 5 small, widely spaced, in one row (Fig. 6 A – B). Apodous segment as long as first chaetiger. First two chaetigers uniramous. Notopodia present with digitiform dorsal and ventral ligules, dorsal ligules reduced but still visible in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, about 1.5 times longer than ventral ligules, similar length throughout chaetigers. Neuropodia with digitiform ventral ligules, acicular ligules, and triangular postchaetal lobes extending to same level of acicular ligule tips. Ventral cirri cirriform, attached basally on ventral parapodia, slightly shorter than ventral ligules, similar length throughout chaetigers (Fig. 6 C). Notochaetae present with homogomph spinigers in anterior chaetigers, homogomph falcigers (Fig. 6 D) from chaetiger 19 – 27 for large specimens or chaetiger 11 – 16 for small specimens. Notopodial falcigerous blades long, slightly curved at tip, with terminal and one large lateral tooth, few smaller teeth basally in posterior chaetigers. Neurochaetae present with homogomph spinigers (Fig. 6 E) and heterogomph falcigers in dorsal fascicles, heterogomph spinigers (Fig. 6 F) and falcigers (Fig. 6 G) in ventral fascicles. All spinigerous blades long, with fine serrations. Neuropodial falcigerous blades long, slightly curved, with fine serrations. Acicula black. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last one to three chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56679FFEE0FC30BC7FC4CFB76.taxon	discussion	Remarks. Our specimens agree well with the original description of N. bifida (Hutchings & Turvey 1982). Wilson (1985) found that the longest tentacular cirri of N. bifida extended to chaetiger 2 – 7, longer than those of our specimens and the original description. Hartmann-Schröder (1990) found 10 – 11 teeth on each jaw, more teeth than our specimens and material examined by previous studies (Hutchings & Turvey 1982; Wilson 1985). In small animals, dorsal notopodial ligules are absent in posterior chaetigers (Hartmann-Schröder 1984).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56679FFEE0FC30BC7FC4CFB76.taxon	distribution	Distribution. Temperate Australia: Western Australia, South Australia, Victoria, Tasmania, New South Wales (Table 2). Habitat. Intertidal, subtidal, rocky shores, seagrass beds (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56678FFEC0FC30E47FCF1FCEE.taxon	description	Figs 7 A – H, 19 E – F	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56678FFEC0FC30E47FCF1FCEE.taxon	materials_examined	Type locality. Shark Bay and Cockburn Sound, Western Australia. Material examined. Western Australia: Kalbarri, 27 ° 43 ′ 17.09 ″ S 114 ° 9 ′ 11.39 ″ E, 15 November 2020, 5 specimens (WAM V 11633). Kalbarri, 27 ° 43 ′ 17.09 ″ S 114 ° 9 ′ 11.39 ″ E, 15 November 2020, female epitoke, 1 specimen (WAM V 11634). Horrock, 28 ° 23 ′ 23.32 ″ S 114 ° 25 ′ 48.98 ″ E, 18 November 2020, 1 specimen (WAM V 11635). Glenfield Beach, 28 ° 41 ′ 01.32 ″ S 114 ° 36 ′ 21.65 ″ E, 17 November 2020, 1 specimen (WAM V 11636). Dynamite Bay, Green Head, 30 ° 4 ′ 15.62 ″ S 114 ° 57 ′ 44.93 ″ E, 28 December 2020, 2 specimens (WAM V 11637). Yanchep Beach, 31 ° 33 ′ 02.36 ″ S 115 ° 37 ′ 24.86 ″ E, 14 January 2021, 1 specimen (WAM V 11638). Avalon Point, Mandurah, 32 ° 35 ′ 40.25 ″ S 115 ° 38 ′ 00.16 ″ E, 13 January 2021, 1 specimen (WAM V 11639). Ellensbrook Beach, 33 ° 54 ′ 25.59 ″ S 114 ° 59 ′ 16.29 ″ E, 18 December 2020, 3 specimens (WAM V 11640). Cape Mentelle, 33 ° 57 ′ 45.04 ″ S 114 ° 58 ′ 46.85 ″ E, 17 December 2020, 1 specimen (WAM V 11641). Comparative material. Nereis cockburnensis det. C. Glasby, Tanker Jetty, Esperance, Western Australia, 33 ° 51 ′ S 121 ° 55 ′ E, coll. Mulligan, Esperance Port Survey, March 2002, 1 (NTM W 18361).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56678FFEC0FC30E47FCF1FCEE.taxon	description	Description. Complete specimens with 38 – 65 chaetigers, body 21.4 – 32.6 mm long and 1.5 – 2.2 mm wide; cream yellow in alcohol. An incomplete specimen 34 chaetigers, posterior end missing, remaining body 11.2 mm long and 1.3 mm wide; cream yellow in alcohol. Prostomium longer than wide. Eyes black, two pairs, equal sizes, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, as long as palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 3 – 5. Pharyngeal jaws black, curved at tips, with seven teeth on each jaw. Paragnaths, reddish black, conical, present on maxillary and oral rings, arranged as follows: Area I = 1, Area II = 8 – 9 in two rows, Area III = 1 – 6, Area IV = 14 – 23, Area V = 3 – 17 in an irregular cluster and most cones extending onto Area VI, Area VI = 4 – 5 in two rows, Areas VII – VIII = numerous cones in 2 – 6 irregular rows, cones smaller toward posterior rows (as viewed on everted pharynx), most antero-ventral row present with alternating large and small cones, posterior rows present with small cones only (Fig. 7 A – B). Apodous segment longer than first chaetiger. First two chaetigers uniramous. Notopodia present with digitiform dorsal and conical ventral ligules in anterior chaetigers, ventral ligules become digitiform in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, three times longer than dorsal ligules, similar length throughout chaetigers. Neuropodia with conical ventral ligules, acicular ligules, and conical postchaetal lobes extending to same level of acicular ligule tips; ventral ligules become digitiform in posterior chaetigers. Ventral cirri cirriform, attached basally on ventral parapodia, slightly longer than ventral ligules (Fig. 7 C). Notochaetae present with homogomph spinigers (Fig. 7 D) and falcigers (Fig. 7 E) from chaetiger 3, homogomph falcigers (Fig. 7 F) in posterior chaetigers. First notopodial falcigerous blades (at chaetiger 3) long, with serrated lateral teeth, remaining notopodial falcigerous blades short, with long terminal tooth and three smaller lateral teeth distally. Neurochaetae present with homogomph spinigers and heterogomph falcigers in dorsal fascicles, heterogomph spinigers (Fig. 7 G) and falcigers (Fig. 7 H) in ventral fascicles. All spinigerous blades long, with fine serrations. Neuropodial falcigerous blades short, with fine serrations. Acicula black. Pygidium with anus on dorsal side, with cirriform anal cirri, as long as last four chaetigers. An incomplete, female epitokous specimen with 62 chaetigers, posterior end missing, remaining body 32.5 mm long and 2.5 mm wide; cream yellow in alcohol. Specimen present with black, enlarged, overlapping paired eyes. Body divided into 16 pre-natatory chaetigers, 39 natatory chaetigers, and 7 post-natatory chaetigers. Neuropodial postchaetal lobes modified into large, flat lamella in natatory chaetigers. Dorsal and ventral cirri unmodified but developing small basal lamella in natatory chaetigers. Paddle-shaped notochaetae in natatory chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56678FFEC0FC30E47FCF1FCEE.taxon	discussion	Remarks. Juveniles have been observed to have a single, bifurcated antenna, instead of one pair, as their bases are fused together (Hartmann-Schröder 1986); this condition has been observed in several other nereidid species in the Australian region by CJG and is thought to represent an abnormality. Area V in our specimens and materials examined by Hutchings & Turvey (1982) have the same number of paragnaths but have more paragnaths than that of specimens examined by Augener (1913) (6 cones), Hartman (1954) (1 – 8 cones), Day (1975) (1 – 8 cones), and Wilson (1985) (1 – 3 cones). Those paragnaths are arranged in an irregular cluster, instead of two rows (Augener 1913). Nereis thompsoni Kott, 1951 was synonymised with N. cockburnensis by Hutchings & Turvey (1982). Our specimens agree well with the original description of N. thompsoni, except that Area V of this species has fewer paragnaths (3 large cones) (Kott 1951; Hartman 1954). The comparative specimen was collected within the same general area of the survey material. It matches closely the survey specimens and the type description. A characteristic feature of this species is the combination of large and small cones in Areas VII – VIII; the colour images also revealed pseudo-articulation of the antennae and tentacular cirri, which is unusual among nereidids and may be another characteristic feature of the species (Fig. 19 E – F).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56678FFEC0FC30E47FCF1FCEE.taxon	distribution	Distribution. Temperate Australia: Western Australia, South Australia, Victoria, New South Wales (Table 2). Habitat. Intertidal, subtidal, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667AFFF20FC308FFFB38FDD2.taxon	description	Figs 8 A – G, 19 G – H	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667AFFF20FC308FFFB38FDD2.taxon	materials_examined	Type locality. Shark Bay, Western Australia. Material examined. Western Australia: Cape Bosut, Bidyadanga, 18 ° 42 ′ 04.99 ″ S 121 ° 37 ′ 34.11 ″ E, 3 November 2020, 2 specimens (WAM V 11642). Cape Keraudren, 19 ° 57 ′ 51.30 ″ S 119 ° 47 ′ 16.94 ″ E, 5 November 2020, male epitoke, 1 specimen (WAM V 11643). North West Cape, Ningaloo, 21 ° 47 ′ 35.17 ″ S 114 ° 10 ′ 22.77 ″ E, 27 September 2020, 3 specimens (WAM V 11644). Lighthouse Bay, Ningaloo, 21 ° 48 ′ 19.86 ″ S 114 ° 07 ′ 48.61 ″ E, 26 September 2020, 1 specimen (WAM V 11645). Jurabi, Ningaloo, 21 ° 50 ′ 44.05 ″ S 114 ° 02 ′ 09.22 ″ E, 25 September 2020, 6 specimens (WAM V 11646). Yardie Creek, Ningaloo, 22 ° 19 ′ 35.90 ″ S 113 ° 48 ′ 33.70 ″ E, 24 September 2020, 5 specimens (WAM V 11647). Bateman Bay, 23 ° 02 ′ 32.68 ″ S 113 ° 49 ′ 39.59 ″ E, 20 September 2020, 1 specimen (WAM V 11648). Gnaraloo, 23 ° 46 ′ 21.83 ″ S 113 ° 32 ′ 09.24 ″ E, 22 September 2020, 3 specimens (WAM V 11649). Shag Rock Beach, Nambung, 30 ° 35 ′ 40.00 ″ S 115 ° 06 ′ 11.00 ″ E, 31 December 2020, 4 specimens (WAM V 11650). Comparative material. Nereis denhamensis, det. C. Glasby, East Point, Northern Territory, 12 ° 25 ′ S 130 ° 49 ′ E, coll. C. Glasby, 28 October 2003, 2 (NTM W 19015).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667AFFF20FC308FFFB38FDD2.taxon	description	Description. Complete specimens with 57 – 62 chaetigers, body 16.1 – 25.4 mm long and 1.0 – 1.8 mm wide; cream yellow to reddish brown in alcohol. Incomplete specimens with 31 – 55 chaetigers, posterior end missing, remaining body 10.4 – 32.5 mm long and 0.9 – 2.0 mm wide; cream yellow to reddish brown in alcohol. Prostomium longer than wide. Eyes black, two pairs, equal sizes, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, shorter than palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 1 – 3 (Fig. 8 A). Pharyngeal jaws translucent reddish black, curved at tips, with eight teeth on each jaw. Paragnaths translucent reddish black, conical, present on maxillary and oral rings, arranged as follows: Area I = 1 – 3, Area II = 14 – 16 in two rows, Area III = 13 – 18 in 3 – 4 irregular rows, Area IV = 19 – 21 in four curved rows, Area V = 0, Area VI = 5 – 11 very small paragnaths in two rows, Areas VII – VIII = 10 – 13 in one row (Fig. 8 B). Apodous segment about twice longer than first chaetiger. First two chaetigers uniramous. Notopodia present with digitiform dorsal and ventral ligules in anterior chaetigers, basal dorsal ligules enlarged in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, about three times longer than dorsal ligules. Neuropodia with subconical ventral ligules, acicular ligules, and rounded postchaetal lobes extending slightly below acicular ligule tips; ventral ligules become digitiform in posterior chaetigers. Ventral cirri cirriform, attached basally on ventral parapodia, slightly shorter than ventral ligules (Fig. 8 C). Notochaetae present with homogomph spinigers in anterior chaetigers, homogomph falcigers (Fig. 8 D) from chaetiger 15 – 21. Notopodial falcigerous blades short, with terminal and one lateral tooth, and two smaller teeth basally. Neurochaetae present with homogomph spinigers (Fig. 8 E) and heterogomph falcigers in dorsal fascicles, heterogomph spinigers (Fig. 9 F) and falcigers (Fig. 8 G) in ventral fascicles. All spinigerous blades long, with fine serrations. Neuropodial falcigerous blades short, with fine serrations. Acicula black. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last three to five chaetigers. A complete, male epitokous specimen with 56 chaetigers, body 21.1 mm long and 1.0 mm wide; cream yellow in alcohol. Specimen present black, enlarged, overlapping paired eyes, in rectangular arrangement. Body divided into 16 pre-natatory chaetigers, 23 natatory chaetigers, and 17 post-natatory chaetigers. Neuropodial postchaetal lobes modified into large, flat lamella in natatory chaetigers. In natatory chaetigers, dorsal cirri crenulated basally along outer margin of about two-third part and developing a small basal lamella. Ventral cirri unmodified but developing a small basal lamella in natatory chaetigers. Paddle-shaped notochaetae present in natatory chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667AFFF20FC308FFFB38FDD2.taxon	discussion	Remarks. Nereis denhamensis has been synonymised with N. jacksoni Kinberg, 1865 by Augener (1922 b), Fauvel (1932, 1953), and Hartmann-Schröder (1979, 1980, 1984), but others have kept them as distinct species due to differences in parapodia and notopodial homogomph falcigers (Kott 1951; Hartman 1954; Hutchings & Turvey 1982; Wilson 1985). Paragnaths on Areas I and III can be fewer (0 – 1 cone) but it is rare (Hartmann-Schröder 1980; Hutchings & Turvey 1982; Hartmann-Schröder 1984) and only occur in small specimens (Wilson 1985). In specimens from Victoria, paragnaths on Areas VII – VIII can be arranged in 1 – 2 rows (Wilson 1985). Anal cirri can extend to last 5 – 10 chaetigers (Hutchings & Turvey 1982), longer than those of our specimens. Pre-natatory chaetigers of our male epitoke are same as those of a male epitoke examined by Glasby et al. (2013) but two more chaetigers than those of male epitokes examined by Kott (1951) and Hartman (1954). A comparative specimen from Northern Territory agreed in all aspects with the description above except in Areas VII – VIII, where there were 15 paragnaths in one row (Fig. 19 G – H).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5667AFFF20FC308FFFB38FDD2.taxon	distribution	Distribution. Australia: Northern Territory, Western Australia, and South Australia (Table 2). Habitat. Intertidal, subtidal, rocky shores, inshore reefs, artificial hard substrates (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56664FFF00FC309E3FD58FC32.taxon	description	Fig. 9 A – I	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56664FFF00FC309E3FD58FC32.taxon	materials_examined	Material examined. Holotype. Western Australia: Port Denison, 29 ° 16 ′ 33.59 ″ S 114 ° 54 ′ 45.68 ″ E, 29 December 2020, 1 specimen (WAM V 11651). Paratypes: Kalbarri, 27 ° 43 ′ 17.09 ″ S 114 ° 09 ′ 11.39 ″ E, 15 November 2020, 2 specimens (WAM V 11652). Horrock, 28 ° 23 ′ 23.32 ″ S 114 ° 25 ′ 48.98 ″ E, 18 November 2020, 2 specimens (WAM V 11653). Glenfield Beach, 28 ° 41 ′ 01.32 ″ S 114 ° 36 ′ 21.65 ″ E, 17 November 2020, 2 specimens (WAM V 11654). Dynamite Bay, Green Head, 30 ° 04 ′ 15.62 ″ S 114 ° 57 ′ 44.93 ″ E, 28 December 2020, 2 specimens (WAM V 11655). Yanchep Beach, 31 ° 33 ′ 02.36 ″ S 115 ° 37 ′ 24.86 ″ E, 14 January 2021, 3 specimens (WAM V 11656). Beaumaris Beach, 31 ° 44 ′ 23.57 ″ S 115 ° 43 ′ 17.82 ″ E, 18 January 2021, 1 specimen (WAM V 11657). Cape Peron, 32 ° 15 ′ 59.14 ″ S 115 ° 41 ′ 06.74 ″ E, 12 January 2021, 1 specimen (WAM V 11658). Hunters Beach, Green Head, 30 ° 4 ′ 27.54 ″ S 114 ° 58 ′ 11.46 ″ E, 29 July 2016, 1 specimen (WAM V 11659).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56664FFF00FC309E3FD58FC32.taxon	description	Description. Holotype a complete specimen with 54 chaetigers, body 19.1 mm long and 1.3 mm wide; cream yellow in alcohol. Prostomium wider than long. Eyes black, two pairs, equal sizes, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, extending to level of palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 5. Pharyngeal jaws translucent reddish black, curved at tips, with nine teeth on each jaw. Paragnaths reddish black, conical, present on maxillary and oral rings, arranged as follows: Area I = small, 1; Area II = small, 7 on left and 8 on right, in a triangle in each side; Area III = small, 2 in one straight transverse row; Area IV = small, 10 on left and 11 on right, in a curved cluster in each side; Area V = 0; Area VI = small, 6 on left in 2 rows and 5 on right in a circle; Areas VII – VIII = 12 in one row (8 large paragnaths widely spaced and 4 small paragnaths in ventromedial row) (Fig. 9 A – B). Apodous segment slightly longer than first chaetiger. First two chaetigers uniramous. Notopodia present with digitiform dorsal and ventral ligules (Fig. 9 C – E), basal dorsal ligules enlarged in middle (Fig. 9 D) and posterior chaetigers (Fig. 9 E). Dorsal cirri cirriform, attached on middle of dorsal parapodia, twice longer than dorsal ligules, similar length throughout chaetigers. Neuropodia with digitiform ventral ligules, acicular ligules, and triangular postchaetal lobes extending below acicular ligule tips (Fig. 9 C – E). Ventral cirri cirriform, attached basally on ventral parapodia, slightly shorter than ventral ligules in all chaetigers. Notochaetae present with homogomph spinigers in anterior chaetigers, homogomph falcigers (Fig. 9 F) from chaetiger 20, two falcigers in each notopodium. Notopodial falcigerous blades short, smooth, slightly curved at tips. Neurochaetae present with heterogomph falcigers (Fig. 9 G) and homogomph spinigers (Fig. 9 H) in dorsal fascicles, heterogomph spinigers (Fig. 9 I) and falcigers in ventral fascicles. Neuropodial falcigerous blades medium size, with fine serrations. All spinigerous blades long, with fine serrations. Acicula black. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last four chaetigers. Variations in paratypes. Complete specimens with 39 – 69 chaetigers, body 6.2 – 37.3 mm long and 0.4 – 1.5 mm wide; cream yellow in alcohol. Incomplete specimens with 29 – 44 chaetigers, posterior end missing, remaining body 5.7 – 32.9 mm long and 0.7 – 1.5 mm wide; cream yellow in alcohol. Longest tentacular cirri extend to chaetiger 2 – 5. Paragnaths small but larger in Areas VII – VIII, arranged as follows: Area I = 0 – 1, Area II = 3 – 8 in a triangle, Area III = 0 – 5 in one straight transverse row, Area IV = 5 – 12 in a curved cluster, Area V = 0, Area VI = 2 – 7 in an oval, Areas VII – VIII = 6 – 10 in one row, including 1 – 3 smaller paragnaths in ventromedial row in some specimens. Notopodial homogomph falcigers present from chaetiger 18 – 24, two falcigers (occasionally 3) in each notopodium or 1 – 2 falcigers in small specimens (<15 mm long). Anal cirri as long as last three to four chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56664FFF00FC309E3FD58FC32.taxon	discussion	Remarks. Nereis edentata n. sp. most closely resembles Nereis species having one row of paragnaths on Areas VII – VIII and smooth notopodial homogomph falcigers including: Nereis coutieri Gravier, 1899, Nereis eugeniae (Kinberg, 1865) and Nereis posidoniae Hutchings & Rainer, 1979. Nereis edentata n. sp. and N. coutieri have enlarged dorsal notopodial ligules in posterior chaetigers, but they differ in the ornamentation of the dorsal chaetiger 2 and the arrangement of paragnaths on Areas III and VII – VIII. Nereis coutieri has a brown band dorsally on chaetiger 2 (Gravier 1899 a; Gravier 1902; Fauvel 1911; Yousefi et al. 2011), while Nereis edentata n. sp. lacks a band. Nereis coutieri has more paragnaths on Area III (5 – 7) (Gravier 1899 a; Gravier 1902; Yousefi et al. 2011) and those paragnaths are arranged in a curved row with a deep concavity ahead in specimens from the Red Sea (type locality) (Gravier 1899 a; Gravier 1902) or an irregular group in specimens from South Africa and Mozambique (Day 1967), instead of in a straight transverse row as for Nereis edentata n. sp. Paragnaths on Areas VII – VIII are present in a similar size for N. coutieri (Gravier 1899 a; Gravier 1902; Day 1967; Bonyadi-Naeini et al. 2017) but in two sizes for some specimens of Nereis edentata n. sp. In addition, N. coutieri has only one uniramous chaetiger in the first parapodium (Fauvel 1911) although this is not mentioned in the original description (Gravier 1899 a) and previous studies (Gravier 1902; Day 1967; Yousefi et al. 2011), while Nereis edentata n. sp. has two uniramous chaetigers in first two parapodia. Nereis edentata n. sp. also differs from materials from Lizard Island, Queensland that were identified by Glasby (2015) as Nereis cf. coutieri. Dorsal notopodial ligules of the latter species are shorter than ventral notopodial ligules (Glasby 2015). Hartmann-Schröder (1982, 1983) found N. coutieri from south-west Australia (Yallingup and Margaret River). These specimens need to be assessed further as there was no description of the ornamentation of the dorsal chaetiger 2 and the arrangement of paragnaths on Area III. Nereis edentata n. sp., N. eugeniae, and N. posidoniae do not have a pigmented band on the dorsal chaetiger 2, but they differ in the size of the eyes, the length of the tentacular cirri, the presence of paragnaths on Area VI, and the enlargement of dorsal notopodial ligules in posterior chaetigers. The eyes of N. eugeniae are small and occasionally absent (Hartman 1964; Day 1967; Darbyshire 2014). The tentacular cirri of N. eugeniae and N. posidoniae are shorter than those of Nereis edentata n. sp., with the longest one extending to only the apodous segment (Kinberg 1865; Hartman 1964; Day 1967; Hutchings & Rainer 1979; Darbyshire 2014). Paragnaths on Area VI are absent for N. posidoniae (Hutchings & Rainer 1979) but present for Nereis edentata n. sp. and N. eugeniae (3 – 6) (Hartman 1964; Day 1967; Darbyshire 2014). Dorsal notopodial ligules in posterior chaetigers are not expanded in N. eugeniae (Hartman 1964; Day 1967; Darbyshire 2014) and not described in N. posidoniae (Hutchings & Rainer 1979) but enlarged in Nereis edentata n. sp.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56664FFF00FC309E3FD58FC32.taxon	etymology	Etymology. The new species is named after the Latin adjective, edentates, meaning toothless, referring to the smooth-bladed homogomph falcigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56664FFF00FC309E3FD58FC32.taxon	distribution	Distribution. South-west Australia. Distribution records indicate that the new species appears to be transitional between the tropical and temperate Australia realms (Table 2). Habitat. Intertidal, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56666FFF70FC30883FCA3F89F.taxon	description	Fig. 10 A – G	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56666FFF70FC30883FCA3F89F.taxon	materials_examined	Type locality. Shark Bay, Western Australia. Material examined. Western Australia: Cape Keraudren, 19 ° 57 ′ 51.30 ″ S 119 ° 47 ′ 16.94 ″ E, 5 November 2020, 1 specimen (WAM V 11660).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56666FFF70FC30883FCA3F89F.taxon	description	Description. A complete specimen with 66 chaetigers, body 17.9 mm long and 0.9 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, equal sizes, in rectangular arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, as long as palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 2. Pharyngeal jaws yellow translucent, curved at tips. Paragnaths translucent to reddish, conical, present on both maxillary and oral rings, arranged as follows: Area I = 0, Area II = 1, Area III = 0, Area IV = 3 in one row, Area V = 0, Area VI = 0, Areas VII – VIII = 3, small, in one widely spaced row (Fig. 10 A). Apodous segment slightly longer than first chaetiger. First two chaetigers uniramous. Notopodia present with digitiform dorsal and ventral ligules, dorsal ligules completely reduced in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, about three times longer than ventral ligules, similar length throughout chaetigers. Neuropodia with digitiform ventral ligules, acicular ligules, and conical postchaetal lobes extending below acicular ligule tips. Ventral cirri cirriform, attached basally on ventral parapodia, as long as ventral ligules, similar length throughout chaetigers (Fig. 10 B). Notochaetae present with homogomph spinigers in anterior chaetigers, homogomph falcigers (Fig. 10 C – D) from chaetiger 18. Notopodial falcigerous blades long, slightly curved at tips, with terminal and one to two large lateral teeth. Neurochaetae present with homogomph spinigers (Fig. 10 E) and heterogomph falcigers in dorsal fascicles, heterogomph spinigers (Fig. 10 F) and falcigers (Fig. 10 G) in ventral fascicles. All spinigerous blades short, with fine serrations. Neuropodial falcigerous blades long, slightly curved, with fine serrations. Acicula black. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last four chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56666FFF70FC30883FCA3F89F.taxon	discussion	Remarks. Nereis heirissonensis has been synonymized with N. jacksoni by Fauvel (1932, 1953), Hartman (1954), Fauchald (1977), and Hartmann-Schröder (1983), but Hutchings & Turvey (1982) and Wilson (1985) assigned the former species as a distinct species. The redescription of N. jacksoni showed that this species has far more paragnaths on Areas VII – VIII (40 – 45 cones in 2 – 4 rows) and more teeth on the first notopodial homogomph falcigers (Hutchings & Turvey 1982; Wilson 1985). Anal cirri of our specimens are shorter than those of materials examined by previous studies, extending over 7 – 9 chaetigers (Augener 1913; Hutchings & Turvey 1982).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56666FFF70FC30883FCA3F89F.taxon	distribution	Distribution. Temperate Australia: Western Australia, South Australia (Table 2). Habitat. Intertidal, shallow waters, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56660FFF50FC30BC7FD50FC32.taxon	description	Fig. 11 A – J	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56660FFF50FC30BC7FD50FC32.taxon	materials_examined	Material examined. Holotype. Western Australia: Dynamite Bay, Green Head, 30 ° 04 ′ 15.62 ″ S 114 ° 57 ′ 44.93 ″ E, 28 December 2020, 1 specimen (WAM V 11661). Paratypes: Dynamite Bay, Green Head, 30 ° 04 ′ 15.62 ″ S 114 ° 57 ′ 44.93 ″ E, 28 December 2020, 9 specimens (WAM V 11662). Dynamite Bay, Green Head, 30 ° 04 ′ 15.62 ″ S 114 ° 57 ′ 44.93 ″ E, 28 December 2020, male epitoke, 1 specimen (WAM V 11663).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56660FFF50FC30BC7FD50FC32.taxon	description	Description. A holotype specimen incomplete, posterior end missing, with 45 chaetigers, remaining body 9.9 mm long and 0.6 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, equal sizes, in rectangular arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, shorter than palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 3. Pharyngeal jaws reddish brown, curved at tips, with seven teeth on each jaw. Paragnaths small, translucent to reddish, conical, present on maxillary and oral rings, arranged as follows: Area I = 0, Area II = 1 on left and 2 on right, Area III = 0, Area IV = 3 on left and 6 on right, in one curved row each side, Area V = 0, Area VI = 0, Areas VII – VIII = 10 in one row (Fig. 11 A – B). Apodous segment as long as first chaetiger. First two chaetigers uniramous. Notopodia present with strongly reduced dorsal ligules from first chaetiger and conical ventral ligules. Dorsal cirri digitiform, attached on middle of dorsal parapodia, about twice longer than ventral ligules, similar length throughout chaetigers. Neuropodia with conical ventral ligules, acicular ligules, and triangular postchaetal lobes extending to same level of acicular ligule tips. Ventral cirri cirriform, attached basally on ventral parapodia, as long as ventral ligules, similar length throughout chaetigers (Fig. 11 C – E). Notochaetae present with homogomph falcigers from chaetiger 3, one for each notopodia. Notopodial falcigerous blades short, with terminal and three large lateral teeth in anterior chaetigers (Fig. 11 F), two large lateral teeth and two smaller teeth basally in posterior chaetigers (Fig. 11 G). Neurochaetae present with heterogomph falcigers and homogomph spinigers (Fig. 11 H) in dorsal fascicles, heterogomph spinigers (Fig. 11 I) and falcigers (Fig. 11 J) in ventral fascicles. Neuropodial falcigerous and spinigerous blades short, with fine serrations. Acicula reddish brown to black. Variations in paratypes. Complete specimens present with 32 – 44 chaetigers, body 3.9 – 6.8 mm long and 0.3 – 0.4 mm wide; cream yellow in alcohol. Incomplete specimens present with 35 – 38 chaetigers, posterior end missing, remaining body 4.7 – 9.3 mm long and 0.4 – 0.5 mm wide; cream yellow in alcohol. An incomplete, male epitokous specimen present with 51 chaetigers, anal cirri missing, body 10.2 mm long and 0.6 mm wide; cream yellow in alcohol. Longest tentacular cirri extending to chaetiger 1 – 3. Area VI present with 2 – 3 cones, Areas VII – VIII present with 8 – 10 cones in one row, other Areas difficult to see. Notopodial falcigerous blades short, with terminal and two large lateral teeth and one smaller tooth basally. Pygidium present with anus on dorsal side, anal cirri cirriform, as long as last three chaetigers. A male epitokous specimen present with black, enlarged, overlapping paired eyes. Body divided into 11 prenatatory chaetigers, 23 natatory chaetigers, and 17 post-natatory chaetigers. Parapodia elongated, neuropodial postchaetal lobes modified into large, flat lamella in natatory chaetigers. Dorsal cirri swollen basally with elongated lateral papillae in first seven pre-natatory chaetigers, slender and longer with shorter and more papillae in natatory chaetigers, unmodified in post-natatory chaetigers. Ventral cirri swollen basally with lateral papillae in first four pre-natatory chaetigers, slender and longer in natatory chaetigers, unmodified in post-natatory chaetigers. Paddleshaped notochaetae present in natatory chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56660FFF50FC30BC7FD50FC32.taxon	discussion	Remarks. The number and arrangement of paragnaths were evaluated based on the holotype and two paratype specimens (including an epitokous specimen). Other paratype specimens had retracted pharynx and were too small to dissect ventrally. Nevertheless, important taxonomic characters, including parapodia and chaetae, were consistent with those of the holotype and paratype specimens with everted pharynx. Nereis yuedensis n. sp. resembles those Nereis species having one row of paragnaths on Areas VII – VIII and notopodial homogomph falcigers with at least one large lateral tooth, including N. bifida Hutchings & Turvey, 1982; N. denhamensis Augener, 1913; N. falcaria (Willey, 1905); N. heirissonensis Augener, 1913; N. panamensis Fauchald, 1977; N. spinigera Hutchings & Turvey, 1982; N. taitungensis Hsueh, 2020; N. taiwanensis Hsueh, 2020; and N. usticensis Cantone, Catalono & Badalamenti, 2003. However, notopodial homogomph falcigers of the latter species often begin after chaetiger 10 or from median chaetigers. Nereis yuedensis n. sp. also differs in the distinct arrangement of lateral teeth of the notopodial falcigers, the absence of notopodial dorsal ligules, and the arrangement of paragnaths (Table 3). Nereis yuedensis n. sp. differs from N. cockburnensis. The first notopodial homogomph falcigers of both species appear at chaetiger 3, but those of the latter species are present with serrated lateral teeth and the remaining falcigers are present with a long terminal tooth and much smaller teeth basally. In addition, N. cockburnensis has more paragnaths on both maxillary and oral rings and well-developed dorsal notopodial ligules throughout chaetigers. Hartmann-Schröder (1982) assigned a nereidid specimen having notopodial homogomph falcigers at least from chaetiger 5 with 3 – 4 teeth from Jurien Bay (about 25 km from the type locality of N. yuedensis n. sp.) to Nereis cf. jacksoni, yet the arrangement of paragnaths of the specimen was not described. The characteristics of notopodial homogomph falcigers of that specimen is similar to those of N. yuedensis n. sp, and thus they are probably same species.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56660FFF50FC30BC7FD50FC32.taxon	etymology	Etymology. The species is named in honour of the Aboriginal people of the Dynamite Bay area, the Yued (Yued is also the name of the region and dialect group), who are part of the broader group of Noongar Aboriginal Australians who have lived in the southwest corner of Western Australia for approximately 40,000 years. The Yued name for the bay is Cuencandjaa, meaning ‘ mouthful of sand’.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56660FFF50FC30BC7FD50FC32.taxon	distribution	Distribution. Dynamite Bay, Green Head, Western Australia. Although records are limited, at this stage the new species is possibly endemic to temperate Australia realm (Table 2). Habitat. Rocky shores, intertidal (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56662FFFB0FC30BC7FCF8FC8A.taxon	description	Figs 12 A – F, 20 A – B	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56662FFFB0FC30BC7FCF8FC8A.taxon	materials_examined	Type locality. Bohol, Philippines. Material examined. Western Australia: Lighthouse Bay, Ningaloo, 21 ° 48 ′ 19.86 ″ S 114 ° 7 ′ 48.61 ″ E, 26 September 2020, 1 (WAM V 11664). Three Mile, 23 ° 52 ′ 32.41 ″ S 113 ° 29 ′ 38.72 ″ E, 23 September 2020, 1 specimen (WAM V 11665). Comparative material. Perinereis helleri, det. C. Glasby, Fishermans Wharf, Darwin Harbour, Northern Territory, 12 ° 29 ′ S 130 ° 52 ′ E, intertidal, under rocks and in crevices, coll. C. J. Glasby & P. Schroeder, 3 August 2004, 1 (NTM W 19020).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56662FFFB0FC30BC7FCF8FC8A.taxon	description	Description. Incomplete specimens with 33 – 35 chaetigers, posterior end missing, remaining body 9.3 – 27.2 mm long and 0.9 – 2.8 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, equal sizes, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, shorter than palps. Tentacular cirri four pairs with basal articulation, longest ones extending to chaetiger 5. Pharyngeal jaws reddish black, curved at tips, with eight teeth on each jaw. Paragnaths reddish black, present on maxillary and oral rings, arranged as follows: Area I = 5 – 6 cones, Area II = 10 – 12 cones in three curved rows, Area III = 9 – 13 cones with 2 cones at lateral of main group, Area IV = 17 – 20 cones, Area V = 3 cones in a triangle, Area VI = 1 smooth bar, Areas VII – VIII = 42 – 44 cones in two rows (Fig. 12 A – B). Apodous segment slightly longer than first chaetiger. First two chaetigers uniramous. Notopodia present with subconical dorsal and ventral ligules in anterior chaetigers, become digitiform in posterior chaetigers. Notopodial ligules not greatly expanded posteriorly. Dorsal cirri cirriform, attached on middle of dorsal parapodia, as long as dorsal ligules. Neuropodia with subconical ventral ligules, acicular ligules, and rounded postchaetal lobes extending to same level of acicular ligule tips; ventral ligules become digitiform in posterior chaetigers. Ventral cirri cirriform, attached basally on ventral parapodia, shorter than ventral ligules, similar length throughout chaetigers (Fig. 12 C). Notochaetae present with homogomph spinigers. Neurochaetae heterogomph falcigers (Fig. 12 D) and homogomph spinigers (Fig. 12 E) in dorsal fascicles, heterogomph falcigers and spinigers (Fig. 12 F) in ventral fascicles. Homogomph spinigerous blades long, with fine serrations, longer than heterogomph spinigerous blades. Falcigerous blades long, with fine serrations. Acicula black.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56662FFFB0FC30BC7FCF8FC8A.taxon	discussion	Remarks. The specimen examined here fits the description of the species by Hutchings et al. (1991), except for the shorter posterodorsal tentacular cirri (only extending to chaetiger 5 vs. to chaetiger 8 – 16 and having more paragnaths in Area I (5 – 6 vs. 1 – 2). However, comparative material from Darwin Harbour, Northern Territory showed intermediate numbers of paragnaths in Area I (3), while having the longer posterodorsal tentacular cirri (at least to chaetiger 12) (Fig. 20 A – B), thus we view the differences as intraspecific variation. Our specimens from Ningaloo and Three Mile extend to the southerly distribution of this species, which was previously reported only as far south as Enderby Island (20 ° 36 ′ S).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56662FFFB0FC30BC7FCF8FC8A.taxon	distribution	Distribution. Indo-Pacific: Taiwan, Philippines, Indonesia, Australia, Chile (Table 2). Habitat. Intertidal, subtidal, mudflat, rocky shores.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666DFFFA0FC308DBFCF1FE1E.taxon	description	Figs 13 A – F, 20 C – D	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666DFFFA0FC308DBFCF1FE1E.taxon	materials_examined	Type locality. Albany, Western Australia. Material examined. Western Australia: Horrock, 28 ° 23 ′ 23.32 ″ S 114 ° 25 ′ 48.98 ″ E, 18 November 2020, 1 specimen (WAM V 11666). Ellensbrook Beach, 33 ° 54 ′ 25.59 ″ S 114 ° 59 ′ 16.29 ″ E, 24 July 2016, 3 specimens (WAM V 11667). Comparative material. Perinereis variodentata, det. C. Glasby, Taylor Street Marina, Esperance, Western Australia, 33 ° 51 ′ S 121 ° 55 ′ E, coll. Mulligan, 17 March 2002, 2 (NTM W 18369).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666DFFFA0FC308DBFCF1FE1E.taxon	description	Description. Complete specimens with 66 – 75 chaetigers, body 22.1 – 36.0 mm long and 1.8 – 2.9 mm wide; cream yellow in alcohol. An incomplete specimen with 39 chaetigers, posterior end missing, remaining body 8.2 long and 1.1 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, equal sizes, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, shorter than palps. Tentacular cirri four pairs with basal articulation, longest ones extending to chaetiger 6 – 9. Pharyngeal jaws reddish brown, curved at tips, with eight teeth on each jaw. Paragnaths reddish black, present on maxillary and oral rings, arranged as follows: Area I = 8 cones of two sizes, Area II = 7 cones in two oblique rows, Area III = 8 cones in two rows, Area IV = 12 – 13 cones in two oblique rows, Area V = 6 cones in two curved rows, Area VI = two long transverse bars in one row, Areas VII – VIII = 64 – 84 cones in 1 – 3 rows at lateral and 6 rows at ventral (Figs 13 A – B, 20 C – D). Apodous segment as long as first chaetiger. First two chaetigers uniramous. Notopodia present with subconical dorsal and ventral ligules in anterior chaetigers, those ligules become digitiform in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, twice longer than dorsal ligules, similar length throughout chaetigers. Neuropodia with subconical ventral ligules, acicular ligules, and triangular postchaetal lobes extending to same level of acicular ligule tips; ventral ligules become digitiform in posterior chaetigers. Ventral cirri cirriform, attached basally on ventral parapodia, as long as ventral ligules (Fig. 13 C). Notochaetae present with homogomph spinigers (Fig. 13 D). Neurochaetae present with homogomph spinigers and heterogomph falcigers in dorsal fascicles, heterogomph spinigers (Fig. 13 E) and falcigers (Fig. 13 F) in ventral fascicles. All spinigerous blades short, with fine serrations. Falcigerous blades short, curved at tips, with fine serrations. Acicula black. Pygidium with anus on dorsal side, with slender anal cirri, as long as last five chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666DFFFA0FC308DBFCF1FE1E.taxon	discussion	Remarks. In our specimens, Area III has more paragnaths than that of materials examined in the original description (2) (Augener 1913) and previous studies (1 – 6) (Kott 1951; Hartman 1954; Hutchings & Turvey 1982; Hutchings et al. 1991). Area IV is sometimes present with 1 – 2 bars in additional to cones, and the lateral cones in the inner cluster of Area V almost contact Area VI (Hartmann-Schröder 1984; Hutchings et al. 1991). Augener (1913) found homogomph falcigers in the dorsal fascicles of neurochaetae, but we and other studies (Kott 1951; Hutchings & Turvey 1982; Hutchings et al. 1991) did not find them.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666DFFFA0FC308DBFCF1FE1E.taxon	distribution	Distribution. Temperate Australia: South-West Australia, New South Wales, South Australia, Tasmania (Table 2). Habitat. Intertidal, subtidal, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666CFFF80FC30DC0FC5BFABE.taxon	description	Fig. 14 A – G	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666CFFF80FC30DC0FC5BFABE.taxon	materials_examined	Type locality. Southern Australia. Material examined. Western Australia: Horrock, 28 ° 23 ′ 23.32 ″ S 114 ° 25 ′ 48.98 ″ E, 18 November 2020, 1 specimen (WAM V 11668). Coronation Beach, 28 ° 33 ′ 16.88 ″ S 114 ° 33 ′ 48.66 ″ E, 19 November 2020, 1 specimen (WAM V 11669). Glenfield Beach, 28 ° 41 ′ 01.32 ″ S 114 ° 36 ′ 21.65 ″ E, 17 November 2020, 1 specimen (WAM V 11670). Shag Rock Beach, Nambung, 30 ° 35 ′ 40.00 ″ S 115 ° 06 ′ 11.00 ″ E, 31 December 2020, 2 specimens (WAM V 11671). Yanchep Beach, 31 ° 33 ′ 02.36 ″ S 115 ° 37 ′ 24.86 ″ E, 14 January 2021, 1 specimen (WAM V 11672). Yanchep Beach, 31 ° 33 ′ 02.36 ″ S 115 ° 37 ′ 24.86 ″ E, 14 January 2021, female epitoke, 1 specimen (WAM V 11673). Beaumaris Beach, 31 ° 44 ′ 23.57 ″ S 115 ° 43 ′ 17.82 ″ E, 18 January 2021, 5 specimens (WAM V 11674). Avalon Point, Mandurah, 32 ° 35 ′ 40.25 ″ S 115 ° 38 ′ 00.16 ″ E, 13 January 2021, 3 specimens (WAM V 11675). Gnarabup, 33 ° 59 ′ 33.73 ″ S 114 ° 59 ′ 20.16 ″ E, 16 December 2020, 1 specimen (WAM V 11676). Foul Bay Beach, 34 ° 13 ′ 56.54 ″ S 115 ° 01 ′ 55.97 ″ E, 15 December 2020, 1 specimen (WAM V 11677). Hunters Beach, Green Head, 30 ° 4 ′ 27.54 ″ S 114 ° 58 ′ 11.46 ″ E, 29 July 2016, 1 specimen (WAM V 11678). Cape Peron, 32 ° 15 ′ 59.14 ″ S 115 ° 41 ′ 06.74 ″ E, 26 July 2016, 3 specimens (WAM V 11679). Ellensbrook Beach, 33 ° 54 ′ 25.59 ″ S 114 ° 59 ′ 16.29 ″ E, 24 July 2016, 1 specimen (WAM V 11680).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666CFFF80FC30DC0FC5BFABE.taxon	description	Description. Complete specimens with 34 – 77 chaetigers, body 5.4 – 26.8 mm long and 0.4 – 1.8 mm wide; cream yellow in alcohol. Incomplete specimens with 42 – 53 chaetigers, posterior end missing, remaining body 18.7 – 32.5 mm long and 2.2 – 2.3 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, outer eyes slightly larger than inner ones, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, slightly shorter than palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 7 – 12. Pharyngeal jaws reddish brown, curved at tips, with seven teeth on each jaw. Paragnaths reddish brown, pectinate bars, present on maxillary and oral rings, arranged as follows: Area I = 0, Area II = 0, Area III = 2 – 3 transverse rows, Area IV = four curved rows, outside ones shorter, Area V = 0, Area VI = two transverse rows, Areas VII – VIII = 5 patches in one row in lateral, two rows in ventral (Fig. 14 A – B). Apodous segment longer than first chaetiger. First two chaetigers uniramous. Notopodia present with subconical dorsal and ventral ligules, dorsal ligules enlarged in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, about four times longer than ventral ligules, similar length throughout chaetigers. Neuropodia with subconical ventral ligules, acicular ligules, and triangular postchaetal lobes extending well beyond acicular ligule tips. Ventral cirri cirriform, attached basally on ventral parapodia, slightly shorter than inferior ligules (Fig. 14 C). Notochaetae present with homogomph spinigers in anterior chaetigers, homogomph spinigers (Fig. 14 D) and falcigers (Fig. 14 E) from chaetiger 21 – 30 or chaetiger 13 in small specimens. Notopodial falcigerous blades long, curved, with fine serrations and a hooked tip connected to blade. Neurochaetae present with homogomph spinigers and heterogomph falcigers (Fig. 14 F) in dorsal fascicles, heterogomph spinigers (Fig. 14 G) and falcigers in ventral fascicles. Neuropodial falcigerous blades medium size, slightly curved at tips, with fine serrations and a hooked tip connected to blade. All spinigerous blades long, with fine serrations. Acicula translucent. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last four to six chaetigers. A complete, female epitokous specimen with 62 chaetigers, body 17.7 mm long and 1.5 mm wide; cream yellow in alcohol. Body divided into 16 pre-natatory chaetigers, 34 natatory chaetigers, and 12 post-natatory chaetigers. Neuropodial postchaetal lobes modified into large, flat lamella in natatory chaetigers. Dorsal and ventral cirri swollen basally, unmodified in natatory chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666CFFF80FC30DC0FC5BFABE.taxon	discussion	Remarks. The species is considered a full species in this study, following Bakken & Wilson (2005) who found obvious differences between Australian specimens of Platynereis antipoda and northern European specimens of Platynereis dumerilii. They could not justify the subspecies based on this information, and thus P. antipoda is assigned as a valid species. Pectinate bars on Area IV can also be arranged in 3 – 4 triangular rows (Hutchings & Turvey 1982). Pre-natatory chaetigers of our female specimens were fewer than those of female P. antipoda from Port Hedland, Western Australia (21) (Hartmann-Schröder 1979), Port Jackson, New South Wales (21) (Hartman 1954), and South Australia (18) (Hutchings & Turvey 1982), suggesting that they are probably sympatric species. Morphological examination of both male and female epitokes of P. antipoda across Australian waters will better establish the limits of species. Read (2007) has described sympatric species of Platynereis from New Zealand based on both epitokous male and female specimens. Hutchings & Rainer (1979) found that P. antipoda from Careel Bay, New South Wales has dark brown acicula and no notopodial falcigers. Those characteristics look similar to a closely-related species, P. australis (Schmarda, 1861), which has black acicula (Imajima 1972) and lacks notopodial falcigers in adults (Hutchings & Reid 1991).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666CFFF80FC30DC0FC5BFABE.taxon	distribution	Distribution. Southern Australia: South-West Australia, South Australia, Victoria (Table 2). Habitat. Intertidal, subtidal, muddy sand, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666EFFFE0FC30E0EFB10FD7E.taxon	description	Figs 15 A – H, 20 E – F	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666EFFFE0FC30E0EFB10FD7E.taxon	materials_examined	Type locality. Ellice Islands and Gilbert Islands. Material examined. Western Australia: Cape Keraudren, 19 ° 57 ′ 46.76 ″ S 119 ° 46 ′ 58.51 ″ E, 5 November 2020, 2 specimens (WAM V 11681). South Mandu, Ningaloo, 22 ° 10 ′ 07.05 ″ S 113 ° 51 ′ 37.79 ″ E, 24 September 2020, 1 specimen (WAM V 11682). Kalbarri, 27 ° 43 ′ 17.09 ″ S 114 ° 09 ′ 11.39 ″ E, 15 November 2020, 2 specimens (WAM V 11683). Avalon Point, Mandurah, 32 ° 35 ′ 40.25 ″ S 115 ° 38 ′ 00.16 ″ E, 13 January 2021, 1 specimen (WAM V 11684). Coral Bay, 23 ° 09 ′ 16.27 ″ S 113 ° 46 ′ 04.40 ″ E, 26 July 2016, 1 specimen (WAM V 11685). Comparative material. Platynereis polyscalma, det. C. Glasby, Channel Island, Middle Arm, Darwin Harbour, Northern Territory, 12 ° 34.9 ′ S 130 ° 55.4 ′ E, reef at 5 – 10 m, coll. S. M. Gregg & T. Bakken, 22 September 2000, 1 (NTM W 19031).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666EFFFE0FC30E0EFB10FD7E.taxon	description	Description. Complete specimens with 31 – 46 chaetigers, body 5.3 – 30.4 mm long and 0.4 – 2.4 mm wide; cream yellow in alcohol. Incomplete specimens with 31 – 39 chaetigers, posterior end missing, remaining body 5.3 – 31.7 mm long and 0.4 – 2.3 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, outer eyes slightly larger than inner ones, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, slightly shorter than palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 7 – 8. Pharyngeal jaws translucent reddish black, curved at tips, with nine teeth on each jaw. Paragnaths reddish black, pectinate bars, present on maxillary and oral rings, arranged as follows: Area I = 0, Area II = 0, Area III = 2 patches in two rows, Area IV = 4 curved rows, lateral ones shorter, Area V = 0, Area VI = two curved rows, Areas VII – VIII = 5 patches in one row at lateral and two rows at ventral (Fig. 15 A – B). Apodous segment as long as first chaetiger. First two chaetigers uniramous. Notopodia present with conical dorsal and ventral ligules in anterior chaetigers, those ligules become digitiform in posterior chaetigers. Dorsal cirri cirriform, attached near edge of dorsal parapodia, about three times longer than dorsal ligules. Neuropodia with conical ventral ligules, acicular ligules, and triangular postchaetal lobes extending to same level of acicular ligule tips; ventral ligules become digitiform in posterior chaetigers. Ventral cirri cirriform, attached basally on ventral parapodia, slightly shorter than ventral ligules (Fig. 15 C). Notochaetae present with homogomph spinigers in anterior chaetigers, homogomph spinigers and falcigers (Fig. 15 D), latter from chaetiger 13 – 17. Notopodial falcigerous blades short, smooth, curved, with a hooked tip connected to blade. Neurochaetae present with homogomph spinigers (Fig. 15 E) and heterogomph falcigers in dorsal fascicles, heterogomph spinigers (Fig. 15 F) and falcigers (Fig. 15 G – H) in ventral fascicles. All spinigerous blades short, with fine serrations. Neuropodial falcigerous blades medium size, with fine serrations and sometimes a tip connected to blade present. Acicula translucent. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last one chaetiger.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666EFFFE0FC30E0EFB10FD7E.taxon	discussion	Remarks. The present specimens fit the description of the species by Hutchings & Reid (1991). They are also very similar to the comparative specimens from Darwin Harbour (Fig. 20 E – F). The species is reported by these authors to be widespread in tropical and warm temperate waters of northern Australia. Our specimen from Falcon, Mandurah extends slightly the southernmost record in Western Australia to 32 ° 35 ′ S. However, as pointed out by Read (2007) cryptic species exist for New Zealand forms of Platynereis australis, and museum specimens cannot be separated into species by morphology. Separation to species requires a consideration of living colour patterns, morphological features of the epitokes, and molecular data (Teixeira et al. 2022). Thus, the Australian fauna of Platynereis, excluding the distinctive P. bicanaliculata Baird, 1863, is each likely to encompass undescribed cryptic species. Living specimens show green pigmentation with white spots on the dorsum and white patch on the prostomium. The pectinate bars in Areas VII – VIII can be arranged in 5 – 6 patches (Glasby 2015).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666EFFFE0FC30E0EFB10FD7E.taxon	distribution	Distribution. Tropical Indian and Pacific Ocean, warm temperate waters of Australia (Table 2). Habitat. Intertidal and subtidal, rocky shores including coralline habitats, sand, mud (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56668FFFD0FC3084EFC05FE62.taxon	description	Figs 16 A – G, 20 G – H	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56668FFFD0FC3084EFC05FE62.taxon	materials_examined	Type locality. Ningaloo, Western Australia. Material examined. Western Australia: Cape Keraudren, 19 ° 57 ′ 46.76 ″ S 119 ° 46 ′ 58.51 ″ E, 5 November 2020, 4 specimens (WAM V 11686). Bateman Bay, 23 ° 02 ′ 32.68 ″ S 113 ° 49 ′ 39.59 ″ E, 20 September 2020, 2 specimens (WAM V 11687). Three Mile, 23 ° 52 ′ 32.41 ″ S 113 ° 29 ′ 38.72 ″ E, 23 September 2020, 2 specimens (WAM V 11688). Coral Bay, 23 ° 09 ′ 16.27 ″ S 113 ° 46 ′ 04.40 ″ E, 26 July 2016, 1 specimen (WAM V 11689). Comparative material. Platynereis uniseris, det. C. Glasby, Ashmore Reef, Western Australia, 12 ° 15 ′ S 123 ° 0 ′ E, coll. B. C. Russell, 23 February 1983, 1 (NTM W 19003).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56668FFFD0FC3084EFC05FE62.taxon	description	Description. Complete specimens with 50 – 81 chaetigers, body 6.2 – 27.3 mm long and 0.6 – 1.4 mm wide; cream yellow to reddish brown in alcohol. Incomplete specimens with 29 – 33 chaetigers, posterior end missing, remaining body 9.5 – 15.0 mm long and 1.1 – 1.4 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, outer eyes slightly larger than inner ones, in rectangular arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, extend to level of palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 5 – 11. Pharyngeal jaws translucent reddish black, curved at tips, with eight teeth on each jaw. Paragnaths reddish black, pectinate bars, present on maxillary and oral rings, arranged as follows: Area I = 0, Area II = 0, Area III = 7 patches in two rows at lateral and three rows in central, Area IV = four curved rows, lateral ones shorter, Area V = 0, Area VI = one slightly curved row, Areas VII – VIII = 5 patches in one row (Fig. 16 A – B). Apodous segment as long as first chaetiger. First two chaetigers uniramous. Notopodia present with conical dorsal and ventral ligules in anterior chaetigers, and those ligules become digitiform in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, about twice longer than dorsal ligules. Neuropodia with conical ventral ligules, acicular ligules, and triangular postchaetal lobes extending to same level of acicular ligule tips; ventral ligules become digitiform in posterior chaetigers. Ventral cirri cirriform, attached basally on ventral parapodia, slightly shorter than ventral ligules (Fig. 16 C). Notochaetae present with homogomph spinigers in first three chaetigers, homogomph spinigers (Fig. 16 D) and falcigers (Fig. 16 E) from chaetiger 4. Notopodial falcigerous blades short, smooth, curved, with a hooked tip connected to blade. Neurochaetae present with homogomph spinigers and heterogomph falcigers in dorsal fascicles, heterogomph spinigers (Fig. 16 F) and falcigers (Fig. 16 G) in ventral fascicles. All spinigerous blades short, with fine serrations. Neuropodial falcigerous blades medium-sized, with fine serrations. Acicula translucent. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last one chaetiger.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56668FFFD0FC3084EFC05FE62.taxon	discussion	Remarks. The present specimens fit the description of the species by Hutchings & Reid (1991). They are also very similar to the comparative specimens from Ashmore Reef, Western Australia (Fig. 20 G – H). As mentioned by these authors, the species is distinguishable from other Australian Platynereis by the presence of a single row of long pectinate bars in the oral ring (P. antipoda and P. polyscalma have two rows). Platynereis uniseris is reported by these authors to be widespread in tropical and warm temperate waters of northern Australia; the present record at Three Mile extends slightly the southern limit of this species for Western Australia. Living specimens show pink pigmentation (Glasby 2015).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56668FFFD0FC3084EFC05FE62.taxon	distribution	Distribution. Northern Australia: North-West Australia, Northern Territory, Queensland (Table 2). Habitat. Intertidal, subtidal, rocky shores, dead coral substrate (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666AFFC30FC30BC7FC53FC32.taxon	description	Fig. 17 A – F	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666AFFC30FC30BC7FC53FC32.taxon	materials_examined	Type locality. Djibouti, Gulf of Aden. Material examined. Western Australia: False Cape Bosut, Bidyadanga, 18 ° 34 ′ 18.40 ″ S 121 ° 43 ′ 42.87 ″ E, 3 November 2020, 1 specimen (WAM V 11690). Cape Keraudren, 19 ° 57 ′ 51.30 ″ S 119 ° 47 ′ 16.94 ″ E, 5 November 2020, 1 specimen (WAM V 11691).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666AFFC30FC30BC7FC53FC32.taxon	description	Description. Complete specimens with 57 – 76 chaetigers, body 13.5 – 37.3 mm long and 1.0 – 2.0 mm wide; cream yellow in alcohol. Prostomium as long as wide. Eyes black, two pairs, equal size, in trapezoidal arrangement. Eyes two pairs, equal size. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, shorter than palps. Tentacular cirri four pairs with basal articulation, longest one extending to chaetiger 3. Pharyngeal jaws black, curved at tips, with eight teeth on each jaw. Paragnaths translucent brown, present on maxillary and oral rings, arranged as follows: Area I = 1 – 3 cones, Area II = 16 – 23 p-bars in a triangle, Area III = 32 – 58 p-bars in 3 – 4 rows, Area IV = 32 – 33 p-bars in four curved rows, Area V = 0, Area VI = 5 – 8 cones in one row, Areas VII – VIII = 12 – 15 cones in one row (Fig. 17 A). Apodous segment as long as first chaetiger. First two chaetigers uniramous. Notopodia present with digitiform dorsal and ventral ligules, dorsal ligules prolonged in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, about three times longer than dorsal ligules. Neuropodia with digitiform ventral ligules, acicular ligules, and triangular postchaetal lobes extending below acicular ligule tips. Ventral cirri cirriform, attached basally on ventral parapodia, as long as ventral ligules (Fig. 17 B). Notochaetae present with homogomph spinigers (Fig. 17 C) in anterior chaetigers, homogomph falcigers (Fig. 17 D) from chaetiger 23 – 39. Notopodial falcigerous blades medium-sized, with fine serrations. Neurochaetae present with heterogomph falcigers (Fig. 17 E) and homogomph spinigers in dorsal fascicles, heterogomph spinigers (Fig. 17 F) and falcigers in ventral fascicles. All spinigerous blades long, with fine serrations. Neuropodial falcigerous blades short, with fine serrations. Acicula black. Pygidium with anus on dorsal side, anal cirri cirriform, as long as last three chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666AFFC30FC30BC7FC53FC32.taxon	discussion	Remarks. In specimens collected from Thailand, paragnaths on Area VI are arranged in 1 – 2 rows (Hylleberg et al. 1986). The tentacular and anal cirri of our specimens are shorter than those of materials examined by Bakken (2007). Notopodial homogomph falcigers can be present from chaetiger 5 to mid-body (Glasby et al. 2013), earlier than those of our specimens. It is noteworthy that the Indonesian species Pseudonereis trimaculata (Horst, 1924) has been found just to the north of the present specimens in Tranquil Bay (13 ° 56 ′ S 127 ° 18 ′ E) intertidally in a sandy bay with rocky headlands (NTM W 19035). It can easily be distinguished from P. anomala by the form of paragnaths in Area VI (see key below).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E5666AFFC30FC30BC7FC53FC32.taxon	distribution	Distribution. Tropical Indian Ocean, Mediterranean Sea, Aegean Sea (Table 2). Habitat. Intertidal, estuary, subtidal, rocky shores, sand (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56655FFCF0FC30882FCF1FDAA.taxon	description	Fig. 18 A – E	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56655FFCF0FC30882FCF1FDAA.taxon	materials_examined	Type locality. Green Island, Rottnest, Western Australia. Material examined. Western Australia: Gnaraloo, 23 ° 45 ′ 48.13 ″ S 113 ° 33 ′ 32.51 ″ E, 21 September 2020, 2 specimens (WAM V 11692). Gnaraloo, 23 ° 45 ′ 48.13 ″ S 113 ° 33 ′ 32.51 ″ E, 21 September 2020, female epitoke, 1 specimen (WAM V 11693). Gnaraloo, 23 ° 46 ′ 21.83 ″ S 113 ° 32 ′ 09.24 ″ E, 22 September 2020, 1 specimen (WAM V 11694). Three Mile, 23 ° 52 ′ 32.41 ″ S 113 ° 29 ′ 38.72 ″ E, 23 September 2020, 2 specimens (WAM V 11695). Kalbarri, 27 ° 43 ′ 17.09 ″ S 114 ° 9 ′ 11.39 ″ E, 15 November 2020, 2 specimens (WAM V 11696).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56655FFCF0FC30882FCF1FDAA.taxon	description	Description. Complete specimens with 48 – 74 chaetigers, body 14.6 – 26.4 mm long and 1.3 – 2.1 mm wide; cream yellow to reddish brown in alcohol. Incomplete specimens with 29 – 35 chaetigers, posterior end missing, remaining body 10.6 – 18.5 mm long and 0.9 – 1.9 mm wide; cream yellow to reddish brown in alcohol. Prostomium as long as wide. Eyes black, two pairs, equal size, in trapezoidal arrangement. Palps one pair, palpophores globose, palpostyles conical. Antennae one pair, shorter than palps. Tentacular cirri four pairs with basal articulation, longest ones extending to chaetiger 2 – 5. Pharyngeal jaws black, curved at tips, with eight teeth on each jaw. Paragnaths present on maxillary and oral rings, arranged as follows: Area I = 0 – 2 cones, Area II = 14 – 26 p-bars in 2 – 4 rows, Area III = 10 – 49 p-bars in 3 – 4 rows, Area IV = 27 – 32 p-bars in 5 – 6 rows, Area V = 0, Area VI = 5 – 12 cones in 1 – 2 rows, Areas VII – VIII = alternating 14 – 17 paragnaths, combination of cones and p-bars (Fig. 18 A – B). Apodous segment slightly longer than first chaetiger. First two chaetigers uniramous. Notopodia present with conical dorsal and ventral ligules, those ligules become subconical in posterior chaetigers, dorsal ligules prolonged in posterior chaetigers. Dorsal cirri cirriform, attached on middle of dorsal parapodia, about three times longer than dorsal ligules, similar length throughout chaetigers. Neuropodia with conical ventral ligules, acicular ligules, and triangular postchaetal lobes extending to same level of acicular ligule tips; ventral ligules become subconical in posterior chaetigers. Ventral cirri cirriform, attached basally on ventral parapodia, slightly longer than ventral ligules, similar length throughout chaetigers (Fig. 18 C). Notochaetae present with homogomph spinigers. Neurochaetae present with homogomph spinigers (Fig. 18 D) and heterogomph falcigers in dorsal fascicles, heterogomph falcigers (Fig. 18 E) in ventral fascicles. All spinigerous blades long, with fine serrations. Falcigerous blades short, with fine serrations. Acicula black. Pygidium with anus on dorsal side, with slender anal cirri, as long as last six chaetigers. An incomplete, female epitokous specimen with 60 chaetigers, posterior end missing, remaining body 17.9 mm long and 2.4 mm wide; cream yellow in alcohol. Specimen present with black, enlarged, overlapping paired eyes, in rectangular arrangement. Body divided into 16 pre-natatory chaetigers and 44 natatory chaetigers; pre-natatory chaetigers longer than natatory chaetigers. All parapodial ligules and lobes modified into large, flat lamella in natatory chaetigers. Dorsal and ventral cirri unmodified but developing small basal lamella from chaetiger 15 (two chaetigers before natatory chaetigers); lamella larger in natatory chaetigers. Paddle-shaped notochaetae in natatory chaetigers.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56655FFCF0FC30882FCF1FDAA.taxon	discussion	Remarks. Pseudonereis rottnestiana has been synonymised with P. anomala by Bakken (2007) because he found no morphological evidence of difference (however, he noted that all notopodial chaetae in the original specimen of P. rottnestiana were broken). However, based on our observations of the specimens at hand, we agree with Fauvel (1932) and Hartman (1954) that P. rottnestiana differs from P. anomala due to the absence of notopodial homogomph falcigers, and herein reinstate the species. Hartmann-Schröder (1979) reported two forms: P. rottnestiana forma seriodentata and P. rottnestiana forma costatodentata. According to Bakken (2007), the first form completely agrees with the original description of P. rottnestiana (Hartmann-Schröder 1979) and the latter form was synonymised with P. trimaculata (Horst, 1924). Tentacular cirri of our specimens are shorter than those of materials examined by Augener (1913) and Fauvel (1932).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56655FFCF0FC30882FCF1FDAA.taxon	distribution	Distribution. Indo-Australian: Andaman, Western Australia, South Australia (Table 2). Habitat. Intertidal, subtidal, rocky shores (Table 2).	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
038C87E56659FFCC0FC3093BFB60FE76.taxon	discussion	* These species were found in the present study. + Neanthes semperiana (Grube, 1878) was originally described as Nereis (Lycoris) semperiana with no information on composition of notochaetae and neurochaetae (Grube 1878). Augener (1922 a) stated that Nereis semperiana from the Kimberley coasts, North-West Australia has homogomph spinigers in the notopodia, homogomph spinigers and heterogomph in the dorsal fascicles of neuropodia, and heterogomph spinigers and falcigers in the ventral fascicles of neuropodia. Notopodial falcigers are absent in this description [Ich habe in zwei Präparaten hinterer Ruder am Dorsalast keine Sichelborsten gefunden, solche fehlen daher mit Bestimmtheit] (Augener 1922 a), thus we moved this species to Neanthes.	en	Hadiyanto, Hadiyanto (2023): Nereididae (Annelida: Phyllodocida) from intertidal macroalgae in Western Australia. Zootaxa 5239 (2): 151-203, DOI: 10.11646/zootaxa.5239.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5239.2.1
