taxonID	type	description	language	source
D06C87AAED596468FF70682C1BE149F8.taxon	description	(Figures 1 – 3, 5)	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED596468FF70682C1BE149F8.taxon	materials_examined	Material examined Holotype. (MNHN-IU 2023 - 500), and two paratypes (ECO-CHZ- 11882), adult females, from Lepidasthenia brunnea sensu Knox, 1960 (MNHN IA 2015 – 1723), MADEEP Expedition, Eastern New Britain, Induna Island, RV Alis, Sta. CP 4266 (4.585 ° S, 152.41 ° E), 575 – 616 m, 26 April 2014, L. Corbari et al., leg. Holotype with egg sacs, paratypes lacking egg sacs. Type locality Eastern New Britain, Induna Island, Research Vessel Alis, Sta. CP 4266 (04 ° 35 ʹ 07.1988 ” S, 152 ° 25 ʹ 03.5904 ” E), depth range: 575 – 616 m.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED596468FF70682C1BE149F8.taxon	etymology	Etymology The species name is an eponym honouring Dr Cyril Chambard (Muséum National d’Histoire Naturelle (Paris, France), who first processed the deep-living polynoids herein reported. Gender is masculine.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED596468FF70682C1BE149F8.taxon	diagnosis	Diagnosis Female with ectosoma globose, with longitudinal medial constriction dividing the ectosoma into two symmetrical hemispheres, except for genital area. Ectosoma with pair of prominent rounded genital swellings separated by large medial posterior protuberance lacking sclerotised dots. Ectosomal integument smooth, translucent. Ectosoma and endosoma connected by short stalk; endosoma discoid, larger than posterior part of ectosoma; endosoma thick proximally, tapering distally. Sclerotised oblong ring in proximal half of endosomal discoid section with adjacent pair of oval cement glands. Egg sacs thick, barrel-shaped, about twice as long as wide, multiseriate, with six or seven rows of eggs. Male copepodid attached by its anterior end to female genital swellings. Copepodid body comprising anterior ovoid, weakly segmented prosome carrying short, 3 - segmented urosome with caudal rami and bearing 4 pairs of legs with 2 - segmented exopods and 1 - segmented endopods.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED596468FF70682C1BE149F8.taxon	description	Description of adult female Ectosoma globose, as long as wide, 954 μm long, 956 μm wide, 0.97 – 1.14 mm long × 0.71 – 0.78 mm wide (paratypes), ectosoma with longitudinal constriction running along medial axis except for genital area, dividing most of ectosoma into two symmetrical hemispheres; constriction marked by narrow belt-like integumental cord. Ectosomal integument smooth, with thin, translucent smooth cuticle showing inner yellow egg mass; genital area undivided, whitish, soft looking, with pair of posteriorly directed genital swellings and medial protuberance (Figure 5 (A, B )). Paired genital swellings sclerotised, prominent (rounded, slightly asymmetrical, each measuring 230 μm, swellings separated medially by a 210 μm gap (gp in Figure 1 (A, B )). Genital swellings carrying egg sacs; holotype lacking egg sac; one paratype carrying one complete sac (1.14 × 0.5 mm, 78 eggs), detached egg sac slightly smaller (0.96 × 0.4 mm, 66 eggs) (es in Figure 3 (A, B )). Intergenital medial surface (= 200 μm) with large, rounded posterior protuberance (Figure 1 (A, B )). Protuberance lacking sclerotised integumental dots. Intersomital stalk short, thick, 160 μm in diameter, originating close to mid-body. Endosoma of holotype 360 μm long, discoid, 480 μm in diameter, peripheral margins simple, basally connected to thick terminal mass (Figure 3 (A, B )). Proximal discoid section with oblong sclerotised ring (sr in Figure 3 (C )) on proximal section (diameter = 260 μm). Pair of rounded cement glands adjacent to sclerotised ring (cg in Figure 3 (C )). Egg sacs barrel-shaped, paired, multiseriate, with up to 7 egg rows (Figure 3 (A, B )), eggs 75 – 85 μm in diameter. Description of males Holotype carrying two male individuals attached to one of the genital swellings (Figures 1 (B) and 2 (A )). First male (M 1 in Figure 2 (A )) flask-shaped, attached to female genital swelling by its anterior end, with 3 - segmented antennule (A 1 in Figure 2 (A )) and remains of urosome posteriorly (UR in Figure 2 (A )); otherwise limbless. Second male (M 2 in Figure 2 (A )), body length = 175 µm, male M 2 lacking antennules at attachment point; body robust, subquadrate, showing dorsal indentations. Urosome (UR in Figure 2 (A )) 3 - segmented, carrying pair of caudal rami armed with 3 terminal caudal setae (CR in Figure 2 (A )); male M 2 likely representing cast-off exuvium of preceding male copepodid stage, with biramous legs 1 – 4 (P 1 – P 4 in Figure 2 (A )), each arising from robust protopod; legs 1 – 4 exopods 2 - segmented, distal exopodal segments of P 1 – 4 armed with two subequally long apical setae. Endopods of legs 1 – 4 1 - segmented, armed with 2 apical setae.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED596468FF70682C1BE149F8.taxon	discussion	Remarks The new species H. chambardi sp. n. exhibits the main diagnostic characters of Herpyllobius according to Lützen (1964 a) and Boxshall et al. (2019). The nominal species of Herpyllobius were grouped by Lützen and Jones (1976) based on taxonomically valuable characters like the presence of a medial intergenital protuberance and the number and arrangement of adjacent integumental processes (sclerotised dots) above or between the genital swellings; this grouping was updated with additional characters by López-González et al. (2000). The new Papuan – New Guinean species is assignable to Lützen and Jones’ (1976) Group I, which comprises species having the genital swellings separated by a prominent, medio-terminal bulging process, and 4 adjacent sclerotised dots. Herpyllobius chambardi lacks sclerotised dots but the presence of a large medial intergenital protuberance allows us to include it in Group I, instead of grouping it with H. haddoni Lützen, 1964, the only species lacking intergenital sclerotised dots or bulges. Group I includes ten other species: H. antepositus Stock, 1986, H. arcticus Steentrup and Lütken, 1861, H. antarcticus Vanhöffen, 1913, H. australis Lützen, 1964, H. cordiformis Lützen, 1964, H. elongata Lützen, 1967, H. rotundus Lützen and Jones, 1976, H. lobosaccus Stock, 1986, H. stocki, López-González, Bresciani and Conradi, 2000, and H. gravieri Lützen, 1964 (Lützen and Jones 1976; López-González et al. 2000; Suárez-Morales and Salazar-Vallejo 2022). The absence of sclerotised dots is a character shared only by H. hourdezi sp. n. and H. stocki among the other species of Group I. These two species can be readily distinguished by the unique medially constricted ectosoma found in H. chambardi in contrast to the unmodified ectosomal surface in H. stocki (López-González et al. 2000).	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED5C6466FE136C301B4E4C40.taxon	materials_examined	Material examined Solomon Sea, Papua New Guinea. One infected specimen (MNHN IA 2015 – 1723), MADEEP Expedition, Eastern New Britain, Induna Island, RV Alis, Sta. CP 4266 (04 ° 35 ʹ 07.1988 ” S, 152 ° 25 ʹ 03.5904 ” E), 575 – 616 m, 26 April 2014, L. Corbari et al., leg.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED5C6466FE136C301B4E4C40.taxon	description	Description of host Parasitised specimen (MNHN IA 2015 – 1723) complete, pale, brownish along prostomium, ceratophores, and parapodial bases (Figure 6 (A )); very few dorsal cirri and elytra on site, first right elytron blackish, corrugated, longer than wide, two far posterior left elytra pale, corrugated. Venter pale. Body 14 mm long (excluding pharynx, 3 mm long), 3.5 mm wide, 48 chaetigers (chaetigers 15 – 28 with attached parasite copepods (Figure 5 (A, B )). Prostomium oval, about 3 times wider than long (Figure 4 (B )). Eyes black, not marginal, anterior eyes 4 – 5 times larger than posterior ones. Median antenna with ceratophore twisted, about 3 times longer than prostomial length; lateral ceratostyles lost. Palps lost. Tentacular cirri lost, tentaculophores without chaetae. Pharynx with two pairs of jaws; marginal papillae partially eroded, 10 pairs (Figure 4 (D )). Elytra almost completely lost. Elytrophores present in chaetigers 2, 4, 5, 7, ... 21, 23, 26, 29, 32, 35, 38, 41, 44, 47. Last 2 left elytra corrugated, probably overlapping laterally, not covering dorsum. Each elytron longer than wide, surface smooth, margin smooth, with a small dark spot in insertion area, and a slightly darker margin area along anterior and external posterior margins (Figure 4 (C). Parapodia sesquirramous. Dorsal cirri tapered, barely swollen subdistally (Figure 4 (E )). Notopodia reduced to notacicular lobe. Neuropodia with long prechaetal (acicular) lobe, and shorter postacicular lobe. Neurochaetae bidentate with series of petaloid denticles along pectinate area (Figure 4 F), becoming progressively smaller distally. Upper neurochaetae thinner, with a longer pectinate area, with about 40 series of denticles; median neurochaetae thicker with about 20 series of denticles; lower neurochaetae shorter with about 15 series of denticles. Ventral cirri tapered. Ventral neuropodial surface with 4 globose papillae (inset in Figure 4 (E )). Nephridial lobes globular to truncate digitate, present along chaetigers 20 – 46, some basally swollen. Posterior region tapered; pygidium with anus terminal, right anal cirrus as long as last 4 chaetigers.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED5C6466FE136C301B4E4C40.taxon	discussion	Remarks on host The polynoid Lepidasthenia brunnea sensu Knox, 1960, as we herein regard it, was described in Lepidametria Webster, 1879, from a single specimen (45 mm long, 4 mm wide, 70 chaetigers) collected from sediments in the Chatham Islands, New Zealand, at 72 m water depth. It had elytra in simple sequence along 23 chaetigers; the following ones had 1 elytron every 3 chaetigers, and the parapodia have no notochaetae, such that it belongs in Lepidasthenia. The Papuan – New Guinean host specimen resembles L. brunnea sensu Knox, 1960 by having ovoid, wider than long prostomium with eyes submarginal, first elytra blackish, parapodia with long prechaetal and postchaetal lobes, and by having papillae along ventral neuropodial surface. The main differences are that in L. brunnea the chaetae are uni- and bidentate, whereas they are all bidentate in our specimen, and that in the latter, the chaetal lobes are more elongate. A fine comparison requires the study of type material to clarify whether they are conspecific, but that is beyond our current objective. If after the study of the type specimen of L. brunnea Knox, 1960, it is shown that it belongs in Lepidasthenia, then it would be homonymous with L. brunnea Day, 1960 (published May 1960), and settling the publication dates would be needed to clarify which has priority. It is interesting that Lepidametria brunnea Knox, 1960 and Lepidasthenia brunnea Day, 1960 resemble each other and their main difference is that in the former, the neuropodium is shorter and longer in the latter. Our host specimen also resembles L. brunnea Day, 1960, originally described from two anterior fragments (longest 40 mm long, 48 chaetigers) dredged in False Bay, South Africa in sediments at 88 m water depth. The resemblance relies in the size of eyes and parapodial lobes, but these two species differ because in our specimen there are fewer papillae along the ventral neuropodial surface (4 vs 8), and all neurochaetae are bidentate (compared with uni- and bidentate).	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED5C6466FE136C301B4E4C40.taxon	distribution	Distribution Papua New Guinea to New Zealand, in sediments at a depth range of 72 – 616 m.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED526464FF6468AF1B064FF2.taxon	description	(Figures 6, 7)	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED526464FF6468AF1B064FF2.taxon	materials_examined	Material examined Holotype. (MNHN-IU 2023 - 501 )), adult ovigerous female, from Harmothoe samadiae sp. n., Papua New Guinea, Cape Croisiles, RV Alis, Sta. CP 4033 (04 ° 52 ʹ 06.8412 ” S, 145 ° 52 ʹ 36.9228 ” E), 780 m, coll. 16 December 2012, S. Samadi, leg. (MNHN 2001 - 170), ethanol-preserved, vial. Type locality Papua New Guinea, Cape Croisiles, RV Alis, Sta. CP 4033 (04 ° 52 ʹ 06.8412 ” S, 145 ° 52 ʹ 36.9228 ” E), depth = 780 m.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED526464FF6468AF1B064FF2.taxon	etymology	Etymology The species name is an eponym honouring Dr Stéphane Hourdez (Banyuls Oceanographic Observatory in Southern France), who first processed the deep-living polynoids herein reported. Gender is masculine.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED526464FF6468AF1B064FF2.taxon	diagnosis	Diagnosis Female Herpyllobius with pear-shaped ectosoma, tapering towards genital area. Genital area with pair of prominent, sclerotised genital swellings with attached egg sacs. Genital swellings separated by depressed margin; intergenital surface lacking sclerotised dots. Ectosomal integument smooth, translucent. Ectosoma and endosoma connected by short stalk originating on underside of ectosoma, close to mid-body. Endosoma with proximal mass extending into two digitiform processes and single, distally twisted process with simple margins. Egg sacs thick, about 4 times as long as wide, multiseriate, with 6 – 8 rows of eggs.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED526464FF6468AF1B064FF2.taxon	description	Description of holotype adult female Ectosoma roughly pear-shaped, 1.2 mm at maximal width, 956 μm high in anterior section, 0.87 mm in posterior section (Figure 6 (A – D )). Ectosomal integument smooth, with thin, translucent cuticle showing inner whitish eggs mass (Figure 7 (A, B )). Genital area with pair of heavily sclerotised, ring-shaped genital swellings (diameter = 245 µm each) (gs in Figure 6 (C )); intergenital area with smooth, depressed margin narrower than genital swellings diameter (arrowhead in Figure 6 (C )). Genital swellings with attached egg sacs (gs in Figure 6 (A, B )). Paired genital swellings sclerotised, prominent, each rounded, slightly asymmetrical, about 255 μm each, swellings separated medially by smooth depression measuring almost 180 μm (arrows in Figure 6 (C, D )). Genital swellings of holotype each carrying egg sac. Egg sacs thick, cylindrical, 1 mm long, 0.45 mm wide. Intersomital stalk short, thick, 130 μm in diameter, originating on underside close to mid-body (stk in Figure 6 (B )). Endosoma 1.3 mm long, with two sections, proximal half anvil-shaped mass, 1.3 mm wide. Distal half with several intermediate lobes (L 1 – 4 in Figure 6 (B )), and curved subtriangular distal lobe (DL in Figure 6 (B )), 125 μm wide. Egg sacs barrel-shaped, paired, multiseriate, with up to 8 egg rows (es in Figure 6 (A – C )), eggs 65 – 85 μm in diameter.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED526464FF6468AF1B064FF2.taxon	discussion	Remarks The new species H. hourdezi lacks a medial intergenital protuberance and sclerotised dots on the ectosoma, so it can be assigned to Group III (sensu Lützen and Jones 1976, López-González et al. 2000). This group originally contained a single species, H. haddoni Lützen 1964, which is characterised by the absence of intergenital sclerotised dots or bulging processes (Lützen 1964; López-González et al. 2000). The group was recently expanded by Suárez-Morales and Salazar-Vallejo (2022) with the addition of five more species: H. luetzeni López-González, Bresciani and Conradi, 2000, H. nipponicus Lützen, 1964, H. cluthensis Boxshall, O’Reilly, Sikorski and Summerfield, 2019, H. polarsterni López-González, Bresciani and Conradi, 2000, and H. stocki López-González, Bresciani and Conradi, 2000. With the addition of H. chambardi sp. n., Group III now comprises seven species; the new species can be distinguished from Group III congeneric species by the structure and details of the endosoma. Herpyllobius cluthensis has a distinctively long, depressed endosoma (Boxshall et al. 2019), H. luetzeni has a massive bilobate endosoma, thus diverging from that described herein for H. depressus; H. nipponicus also diverges from the new species by its possession of a disc-like multilobate endosoma; in H. polarsterni the endosoma is lump-like, with roughly wrinkled surface, clearly diverging from H. hourdezii ’ s endosoma traits. We regard these differences sufficient to justify the proposal of a new species of Herpyllobius.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED57647FFF666E751BE14DD0.taxon	description	(Figures 7 – 9)	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED57647FFF666E751BE14DD0.taxon	materials_examined	Material examined Holotype. (NMNHIA 2000 - 2120), one paratype (MNHN IA 2000 - 2121), both with same field data, Expedition Papua Niugini, Cape Croisiles, Research Vessel Alis, Sta. CP 4033 (04 ° 52 ʹ 06.8412 ” S, 145 ° 52 ʹ 36.9228 ” E), 780 m, wood (tree stump), 16 December 2012, S. Samadi, leg (Paratype damaged, body wall broken by pharynx eversion, and after removal of median parapodia; cephalic peaks distinct; lateral antennae, left palp, and left lower tentacular cirri on site; other cephalic appendages lost; tentaculophore with 3 – 4 chaetae; last left elytron on site, partially damaged by chaetal intrusion; two large parasites on each parapodium of chaetiger 21, one yellowish, the other whitish, and a smaller one on right parapodium of chaetiger 29; body 27 mm long, 8 mm wide, 40 chaetigers). Additional material One specimen (MNHN IA 2017 – 4000), Expedition Papua Niugini, Cape Croisiles, RV Alis, Sta. CP 4033 (04 ° 52 ʹ 06.8412 ” S, 145 ° 52 ʹ 36.9228 ” E), 780 m, 16 December 2012, S. Samadi, leg. (complete, slightly bent ventrally; regenerating posterior end; cephalic peaks sharp; prostomium with a protuberance over the right posterior region; left parapodium of chaetiger 16 removed for observation (kept in container); most elytra on site, covering dorsum; two parasitic copepods under fourth pair of elytra; neurochaetae bidentate, accessory denticles broken; body 10.5 mm long, 4 mm wide, 34 chaetigers). One specimen (MNHN IA 2021 – 82), Expedition Papua Niugini, Cape Croisiles, RV Alis, Sta. CP 4029 (04 ° 52 ʹ 42.8412 ” S, 145 ° 50 ʹ 59.1972 ” E), 680 – 689 m, 16 December 2012, S. Samadi, leg. (complete, bent ventrally; pharynx pale, breaking dorsal body wall; prostomium with small fleshy outgrowths along posterior margin (probably parasite fragments); left parapodia of chaetigers 15 and 17 removed for observation (kept in container), all elytra detached (3 in container); neurochaetae clearly bidentate, accessory denticle long, reaching main fang, mostly straight, some falcate; body 19 mm long, 6 mm wide, 36 chaetigers). Type locality Cape Croisiles, RV Alis, Sta. CP 4033 (04 ° 52 ʹ 06.8412 ” S, 145 ° 52 ʹ 36.9228 ” E), depth = 780 m.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED57647FFF666E751BE14DD0.taxon	etymology	Etymology The species name honours Dr Sarah Samadi in recognition of her participation in the Tropical Deep Sea Benthos programme at the Muséum National d’Histoire Naturelle, Paris, including the expedition on which she led the field work, and during which the holotype was collected.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED57647FFF666E751BE14DD0.taxon	diagnosis	Diagnosis Harmothoe without eyes. Cephalic peaks distinct. Elytra with short sparse fimbriae, and with macro- and microtubercles, conical to digitate, sometimes surpassing elytral margin. Notochaetae with sharp tips. Neurochaetae delicately bidentate, accessory denticle often eroded.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED57647FFF666E751BE14DD0.taxon	description	Description of type specimens Holotype (MNHN IA 2021 – 3) complete, most elytra lost (Figure 8 (A )), first left, fifth right elytra, and right parapodium of chaetiger 16 removed for observation (kept in container), body pale, middorsal wide band blackish (gut), paler along posterior region; a copepod parasite with 2 egg masses fixed dorsally on right parapodium of chaetiger 21, a smaller one on left parapodium of chaetiger 24; posterior chaetigers thinner, without parapodial wall; pharynx fully exposed, breaking apart; venter pale; body 22 mm long, 6 mm wide, 40 chaetigers. Prostomium subhexagonal, wider than long, with cephalic peaks distinct (Figure 8 (B )). Without eyes; 2 oblique transverse thin depressions on each side about typical eye position. Median ceratostyle lost, median ceratophore about 3 times wider and longer than laterals. Lateral ceratostyles papillate, about half as long as palps. Palps massive, smooth, tapered into fine sharp tips. Facial tubercle pale, barely visible dorsally, distorted by everted pharynx. Tentacular segment with 2 pairs of papillate cirri, right ones complete, left ones without dorsal cirrus, with 2 falcate, sharp chaetae. Second chaetiger without nuchal hood; ventral cirri twice longer than following ones. Nephridial papillae indistinct. Pharynx brownish (Figure 8 (A )), 7 mm long (as long as first 15 chaetigers); 2 pairs of blackish jaws, without accessory denticles; 11 pairs of marginal papillae, mostly eroded (Figure 8 (C )). Elytra thin, whitish, with sparse fimbriae with short filaments, especially along posterior margin (Figure 9 (A )); first elytron round, following ones ovoid, longer than wide, overlapping laterally and probably reaching middorsally. Elytra with anterior area with very small microtubercles (Figure 9 (B )) or almost smooth (Figure 9 (C )), becoming larger towards external median area; insertion area transitional regarding abundance and of macrotubercles (Figure 9 (E )); becoming larger towards posterior external margin, with sparse fimbriae (Figure 9 (F )), fimbria shorter along inner margin (Figure 9 (G )), almost disappears in internal posterior region (Figure 9 (H )). Parapodia biramous (Figure 8 (D )). Dorsal cirri tapered, not swollen subdistally, surface papillate (Figure 8 (E )). Notopodium with prechaetal lobe round, short, postchaetal lobe tapered. Notochaetae golden, abundant, of a single type, coarser than neurochaetae, notochaetae shorter and median directed upwards, longer directed laterally, each notochaeta with series of fine denticulations continued almost to the tip, tips sharp (Figure 8 (F )). Neuropodium larger than notopodium, prechaetal lobe elongate, postchaetal lobe round, shorter; acicular lobe with tiny supracicular lobe. Neurochaetae golden, abundant, of a single type, subdistally swollen, with series of long denticles along pectinate area, tips falcate, delicately bidentate (Figure 8 (G )), accessory denticle broken (most entire in MNHN IA 2021 – 82). Ventral cirri tapered. Posterior region tapered; pygidum with anus terminal, anal cirri lost.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED57647FFF666E751BE14DD0.taxon	discussion	Remarks As indicated in the key below, H. samadiae sp. n. groups with H. panamensis Kirkegaard, 1995 and H. ingolfiana Ditlevsen, 1917 because they have macrotubercles on the elytral surface. However, H. samadiae differs from the two other species because its elytra have macrotubercles abundant along posterior elytral area, whereas in the two other species they are sparse, mostly close to elytral margins. In contrast, H. samadiae and H. vagabunda Pettibone, 1985 a are the two only species recorded from wood – the former from a tree stump, the latter from experimental wood panels – but they are quite different in their morphology.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED57647FFF666E751BE14DD0.taxon	distribution	Distribution Only known from the type locality, in wood, in sediments at 780 m water depth. Key to Harmothoe eyeless species (modified from Kirkegaard 1995, Barnich and Fiege 2009)	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED57647FFF666E751BE14DD0.taxon	description	1910 Eastern North Pacific 5 (4) Fimbriae with short filaments .. ..................................................................................................... 6 - Fimbriae with long filaments; microtubercles conical smooth, and globose with tips with 4 – 8 cusps; neurochaetae bidentate .. .................................................................................... ................................................................................... H. derjugini Annenkova, 1937 Sea of Japan 6 (5) Microtubercles of a single type .. .................................................................................................. 7 - Microtubercles of two types, short smooth or with cusps, long blunt or with cusps; neurochaetae bidentate .. ...... ..... H. hollisi Pettibone, 1989 b Eastern Northern Pacific 7 (6) Neurochaetae bidentate ... .............................................................................................................. 8 - Neurochaetae unidentate; microtubercles conical .. .................................................................. ............................................ H. anoculata Hartmann-Schröder, 1975 north-eastern Atlantic 8 (7) Microtubercles digitate .. ....... ...... H. gordae Pettibone, 1990 Eastern Northern Pacific - Microtubercles conical .. ....... H. vagabunda Pettibone, 1985 a north-western Atlantic	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4B647CFE9468291C0C4C31.taxon	description	(Figures 10, 11)	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4B647CFE9468291C0C4C31.taxon	materials_examined	Material examined Adult ovigerous female holotype from Harmothoe sp., Expedition MADEEP, NW Kavieng, RV Alis, Sta. CP 4255 (02 ° 27 ʹ 55.1988 ” S, 150 ° 43 ʹ 33.5928 ” E) (MNHN-IU 2023 - 503), 333 – 420 m, in wood, 24 April 2014, L. Corbari and S. Samadi, leg. Type locality Kavieng, RV Alis, Sta. CP 4255 (02 ° 27 ʹ 55.1988 ” S, 150 ° 43 ʹ 33.5928 ” E) (MNHN 2015 – 1870), depth = 333 – 420 m.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4B647CFE9468291C0C4C31.taxon	etymology	Etymology The species is named after Dr Pablo López-González (Universidad de Sevilla, Spain) for his relevant contributions to the taxonomic knowledge of herpyllobiid copepods.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4B647CFE9468291C0C4C31.taxon	diagnosis	Diagnosis Herpyllobius with female ectosoma roughly oviform, ectosoma expanding towards genital area. Ectosoma whitish except for darker, lightly brownish genital area. Genital area with pair of prominent swellings with attached egg sacs. Genital swellings separated by flat intergenital surface; intergenital surface with four minute sclerotised dots and low, volcano-like medial protuberance. Ectosomal integument translucent, lightly wrinkled. Ectosoma and endosoma connected by short stalk originating on underside of ectosoma. Endosoma with proximal mass expanding into two unequally long, cord-like processes, longest process about 0.7 times as long as ectosoma. Egg sacs thick, slightly curved, about 2.5 times as long as wide, multiseriate, with 6 – 8 rows of eggs.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4B647CFE9468291C0C4C31.taxon	description	Description of holotype adult female Ectosoma ovoid, 1.2 mm at maximal posterior height, 710 μm high at anteriormost section; ectosoma 1.65 mm long. Ectosomal integument whitish, with thin, translucent, lightly wrinkled integument (Figures 10 (B), 11 (F )). Genital area brownish, with pair of heavily sclerotised, ring-shaped genital swellings (diameter = 180 µm, height = 120 µm each) (Figures 10 (A), 11 (F), gs); intergenital area flat, with 4 sclerotised integumental dots (Figure 10 (A), arrowheads) and adjacent volcano-like medial protuberance between genital swellings (Figure 10 (D), arrowhead). Genital swellings with attached egg sacs (Figure 11 (F), es). Holotype carrying 2 egg sacs, one detached during handling. Egg sacs thick, cylindrical, weakly curved, 1.6 mm long, 0.82 mm wide (Figure 11 (F), es); eggs 65 – 85 μm in diameter. Intersomital stalk short, thick, ca. 130 μm in diameter, originating close to mid-body underside (Figure 10 (B), stk). Endosoma of holotype 1.3 mm long, with 2 sections, proximal half umbrella-like, with jagged edges. Distal half with 2 unequally long, cord-like lobes (Figure 10 (C), arrowheads).	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4B647CFE9468291C0C4C31.taxon	discussion	Remarks This new species infecting Harmothoe sp. is assigned to Herpyllobius Sars, 1870 because of its possession of the distinctive characters mentioned by López-González et al. (2006) and Boxshall et al. (2019), including having an ovoid ectosoma, with a pair of sclerotised, prominent genital openings, with 4 sclerotised dots in the intergenital surface, stalk originating close to midline on the underside of ectosoma, and endosoma with digitiform lobes, attached adult males with unsegmented body. The specimen found on Harmothoe sp. from New Guinea closely resembles the widespread H. polynoes (KrØyer, 1863), because of its possession of the following important characters of this species (see Lützen 1964 a): (1) ovoid ectosoma, (2) prominent sclerotised genital swellings, (3) 4 minute sclerotised dots between the genital swellings, (4) thick, ovoid, multiseriate egg sacs, (5) medial volcano-like protuberance adjacent to the sclerotised dots, (6) attachment to the dorsal part of the host prostomium, (7) preference of Harmothoe species as hosts. However, our specimen diverges from H. polynoes in some important respects: (1) the absence of minute cuticular formations close to the genital swellings, on the underside of the ectosoma, is a character particular to this species (Lützen, 1964, fig. 5); and (2) the shape, size, and structure of the endosoma, which is invariably flattened, tongue-shaped and about 3 times as long as the endosoma in H. polynoes, as described and depicted by Lützen (1964), but it is elongate, not flattened in the new species H. pabloi. In addition, Lützen (1964 a) noticed that H. polynoes usually occurs on species of Harmothoe and in most cases with only one copepod individual, as recorded for H. pabloi in our material from New Guinea. Herpyllobius polynoes is largely restricted to Arctic and subarctic latitudes (Lützen, 1964), thus diverging from H. pabloi sp. n., a closely related species found in subtropical waters of the Southern Hemisphere.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4D6478FF606DED1DEE4F44.taxon	description	(Figure 13 – 15)	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4D6478FF606DED1DEE4F44.taxon	materials_examined	Material examined Holotype. ovigerous female from Eunoe corbariae (MNHN IA 2017 – 3996), Papua New Guinea. Expedition Papua Niugini, E Kotakot, RV Alis, Sta. CP 4039 (04 ° 18 ʹ 54.5976 ” S, 145 ° 37 ʹ 07.9716 ” E), 1000 – 1045 m, in sponges, 17 December 2017, S. Samadi, leg. Type locality Papua New Guinea. Kotakot, RV Alis, Sta. CP 4039 (04 ° 18 ʹ 54.5976 ” S, 145 ° 37 ʹ 07.9716 ” E), depth = 1000 – 1045 m.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4D6478FF606DED1DEE4F44.taxon	etymology	Etymology The species name honours the memory of Dr José Bresciani (1926 – 2006), an eminent zoologist at the University of Copenhagen, for his longstanding work on the anatomy and morphology of highly transformed parasitic Copepoda (Dahms 2007).	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4D6478FF606DED1DEE4F44.taxon	diagnosis	Diagnosis Gottoniella female with ectosoma laterally expanded; posterior part of ectosoma strongly protuberant, with 2 large lateral lobes and 1 medial lobe, lateral lobes carrying heavily sclerotised genital swellings; genital openings slit-like, transverse. Distal part of medial lobe with sclerotised ring and pipe-like stalk, in the underside of ectosoma (Endosoma unknown).	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4D6478FF606DED1DEE4F44.taxon	description	Description of adult female holotype Ectosoma up to 1.75 mm in maximum length, 1.22 mm in width, laterally expanded; anterior margin slightly concave, posterior side adjacent to genital swellings strongly protuberant, with 3 rounded lobiform projections, 1 short medial, 2 large lateral ones; latter lobes carrying heavily sclerotised genital swellings. Ectosoma asymmetrical, with right side exhibiting large, curved fin-like process (Figure 13 (A – D), flp, 14 C, 15 I), opposite end conical; height of fin-like process from lateral margin = 0.280 mm; integumental surface of ectosoma smooth. Endosoma recovered in part; proximal section of endosoma with short, sclerotised ring (Figure 13 (C, D), sr) connected to short pipe-like stalk arising underside from posterior end of ectosoma (Figure 13 (C, D), stk). Genital swellings (Figure 13 (B), gs) oblong, heavily sclerotised, with slit-like transverse genital apertures (Figures 13 (C), 14 (C), ga). Ventral surface with large globose protuberance with screw plug-like terminal process (Figure 13 (D), vp). One egg sac present on attached holotype (Figure 14 (B )) sac empty, damaged, detached from body, with scattered remains of eggs.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED4D6478FF606DED1DEE4F44.taxon	discussion	Remarks The genus Gottoniella was originally proposed for female specimens collected from Antarctic waters (374 – 378 m deep) parasitising a species of Harmothoe and an unidentified polynoid (López-González et al. 2006). The genus contains two species, G. antarctica López-González, Bresciani and Conradi, 2006, which is the type species, and G. andeepi López-González, Bresciani and Conradi, 2006. Gottoniella andeepi was found as a parasite of an unidentified species of Harmothoe at a depth of 2895 m in the Scotia Sea, Antarctica. The new species, G. brescianii, can be easily distinguished from its only two congeneric species by its possession of a fin-like curved process on one side of the ectosoma, thus diverging from the symmetrical, rounded lateral ectosomal edges present in G. antarctica (López-González et al. 2006; Figure 9 (A, B )), or the bilateral globose ectosoma of G. andeepi (López-González et al. 2006; Figure 14 (A, B )).	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED436474FE8069A41EEE4BCE.taxon	description	(Figure 15)	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED436474FE8069A41EEE4BCE.taxon	materials_examined	Material examined Holotype. Papua New Guinea. (MNHN IA 2000 - 2122), Expedition Papua Niugini, E Kotakot, RV Alis, Sta. CP 4039 (04 ° 18 ʹ 54.5976 ” S, 145 ° 37 ʹ 07.9716 ” E), 1000 – 1045 m, in sponges, 17 December 2017, S. Samadi, leg. Type locality Papua New Guinea. E Kotakot, RV Alis, Sta. CP 4039 (04 ° 18 ʹ 54.5976 ” S, 145 ° 37 ʹ 07.9716 ” E), depth = 1000 – 1045 m.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED436474FE8069A41EEE4BCE.taxon	etymology	Etymology The specific epithet honours Dr Laure Corbari in recognition of her long-term efforts in organising scientific cruises for sampling tropical deep-sea benthos, including the cruise during which the holotype was collected, and because she has been very supportive of author SIS-V’s research activities for many years.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED436474FE8069A41EEE4BCE.taxon	diagnosis	Diagnosis Eunoe with cephalic peaks. Elytra without fimbriae, macrotubercles cylindrical, spread over elytral surface, microtubercles conical, tips brownish. Notochaetae straight, almost smooth. Neurochaetae of two types, upper neurochaetae terete, with series of distinct denticles, median and lower neurochaetae oar-shaped, almost smooth, straight, non-falcate.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED436474FE8069A41EEE4BCE.taxon	description	Description of host Holotype (MNHN IA 2017 – 3996), complete, bent ventrally, most elytra and cephalic appendages detached (Figure 15 (A )), left elytron 8 and left parapodium of chaetiger 20 removed for observation (kept in container); body pale, middorsal region brownish along median region; one copepod parasite on dorsal side of left parapodium of chaetiger 27, and a detached egg mass in container, fixed under elytron; body 13 mm long, 3 mm wide, 41 chaetigers. Prostomium subrectangular, slightly longer than wide, with cephalic peaks distinct (Figure 9 (B )). Anterior eyes dorsolateral, in widest prostomial area, 2 times as large as posterior ones. Median ceratostyle bent ventrally, thin, about as long as prostomium. Lateral ceratophores ventral, right ceratostyle lost, left one third as large as median ceratostyle, tip thin, long. Left palp massive, about 3 times as long as wide, blunt, right palp lost. Facial tubercle pale, not visible dorsally. Tentacular segment without cirri; left cirrophores with a single chaeta. Second chaetiger without nuchal hood; left ventral cirrus slightly longer than following ones. Nephridial papillae cylindrical, blunt, along chaetigers 3 – 36. Pharynx not exposed. Elytra thin, whitish, non-fimbriate (Figure 15 (C )), with macrotubercles cylindrical, blunt, transparent, spread over elytral surface; microtubercles present along median and posterior elytral surface, each conical, tips brownish (Figure 15 (D, E )). Insertion area with similar density and size of microtubercles than adjacent regions. Parapodia biramous (Figure 15 (F )). Dorsal cirri tapered, not swollen subdistally, surface papillate, tip thin, one-fourth as long as cirrostyle. Notopodium with acicular lobe projected. Notochaetae coarser than neurochaetae, abundant, upper ones directed dorsally, median and lower ones directed laterally, of a single type, straight or slightly bent, with indistinct denticulation, tips entire (inset in Figure 15 (G )). Neuropodium larger than notopodium, with very long acicular lobe, tip sometimes directed dorsally. Neurochaetae golden abundant, of two types, upper ones terete, with series of denticles along median region, tip entire, median and lower ones oar-shaped, with indistinct denticulation, tips entire, non-falcate (Figure 9 (H )). Ventral cirri thin, tapered. Posterior region tapered (Figure 15 (I )); pygidium with anus terminal, slightly prolapsed, anal cirri lost.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED436474FE8069A41EEE4BCE.taxon	discussion	Remarks Eunoe corbariae sp. n. is unique among Eunoe species because it has two types of neurochaetae: the most abundant ones are oar-shaped, smooth or very finely denticulate along margins, and two superior chaetae provided with series of fine denticulations leaving smooth the distal part. In the key to Eunoe species by Uschakov (1982), the only species with fine denticulation along chaetae is the subarctic E. bathydromus (Ditlevsen, 1917), but E. corbariae differs from it because its elytra do not have large globular processes along posterior elytral half, which are distinctive in E. bathydromus. Uschakov (1982, pp. 353 – 354) compared E. bathydromus with other species having small denticulation along chaetae, and they differ from E. corbariae as follows. Eunoe opalina M’Intosh, 1885, described from the Strait of Magellan, has elytra without large globular processes (absent in E. corbariae), and neurochaetae with tips markedly falcate, and not tapered like in E. corbariae. Eunoe corbariae also differs from E. caeca Moore, 1910, described from the Northern Pacific, by having eyes, a very long neuracicular lobe (compared with a short one), and by having straight neurochaetae (compared with being distally falcate). The last species included by Uschakov was E. laetmogonensis Kirkegaard and Billet, 1980, described from off Ireland and NW Africa, which also has falcate neurochaetae. In contrast, E. corbariae also differs from E. kermadeca Kirkegaard, 1995, because the latter has shorter, straight neuracicular lobes and falcate, sharp neurochaetae, whereas neuracicular lobes are longer and rectangular in E. corbariae, and its neurochaetae are straight.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
D06C87AAED436474FE8069A41EEE4BCE.taxon	distribution	Distribution Only known from off Madang, Papua New Guinea, in sediments with sponges at 1000 – 1045 m water depth.	en	Suárez-Morales, Eduardo, Salazar-Vallejo, Sergio I. (2025): Expanding territories: new host records and four new species of herpyllobiid parasitic copepods (Copepoda: Herpyllobiidae) from Papua New Guinea deep-water polynoid polychaetes (Annelida: Polynoidae). Journal of Natural History 59 (13 - 16): 1017-1047, DOI: 10.1080/00222933.2025.2474196, URL: https://doi.org/10.1080/00222933.2025.2474196
