taxonID	type	description	language	source
2202BF4FFFCF5B7BFC06548FFBBDFEB8.taxon	type_taxon	Type species. Branchiomma kollikeri Claparède, 1869, a junior synonym of Amphitrite vesiculosum Montagu, 1815 (see Tovar-Hernández & Salazar-Vallejo, 2008). Synapomorphy. Presence of subdistal, sessile and compound radiolar eyes, at least on the internal margin of the dorsalmost pair of radioles (Fitzhugh, 1989).	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFCF5B7BFC06548FFBBDFEB8.taxon	discussion	Remarks. There are other morphological characters that have been included in the diagnosis of the genus (see last emendation by Tovar-Hernández & Salazar-Vallejo, 2008) and are herein assessed. Megalomma has been attributed with rounded external margins of radioles, but some of the species described in the present study clearly show distinct externally quadrangular margins along some length of their radioles (Fig. 1 G). However, it is not easy to distinguish between the two states (see also Fitzhugh, 1989, p. 21), and this may not be a significant character anyway. The species studied have longitudinal bands of cilia on the outer lateral edges (Fig. 1 H) as stated by Perkins (1984) but this features is not unique to Megalomma and they have been described in other genera [e. g., Laonome (Capa, 2007)]. The radioles are supported by rows of vacuolated cells (referred to as the radiolar skeleton). The number of rows is variable within the genus and also within some of the species. It has been stated by Tovar-Hernández & Salazar-Vallejo (2008) that the maximum number of rows is 16, but some of the specimens described in this study (e. g., M. phyllisae n. sp., Fig. 4 A) exhibit up to 30 cells in transverse section (see variability of rows in radiolar skeleton in Fig. 5). In Megalomma, the ventral lips terminate ventrally in parallel lamellae, as defined by Nicol (1931) and Fitzhugh (1989), seen between the ventral lappets of the peristomial collar, and some species also possess vesicles “ formed by the outpocketing of the parallel lamellae ” called ventral sacs (as in Fitzhugh, 1989) (Fig. 1 I, J). Tovar-Hernández & Salazar-Vallejo (2008) described for the first time the existence of a caruncle in some Megalomma species, as an erect, triangular ciliated lobe, between the dorsal lips. The examination of Australian specimens has determined the presence of a smooth “ keel ” in some species but its detailed morphology, ultrastructure or function has not been studied. It does not appear to be homologous to the caruncle, rather it is a smooth projection of the peristomium arising between the dorsal lips, forming a ventrally-directed ridge. Characters and states relating to chaetae and uncini should also be reconsidered, as there is probably more variation in the genus than has been recorded so far. Previous studies agree that notochaetae of the first chaetiger are elongate and narrowly hooded, as are the rest of the superior thoracic chaetae (Perkins, 1984; Fitzhugh, 1989, 2003; Tovar- Hernández & Salazar-Vallejo, 2008), and that the inferior thoracic notochaetae are broadly hooded (Perkins, 1984; Fitzhugh, 1989, 2003; Tovar-Hernández & Salazar-Vallejo, 2008) but with hoods variable in length (Tovar-Hernández & Salazar-Vallejo, 2008). Abdominal neurochaetae have been described as elongated, narrowly hooded chaetae (Perkins, 1984; Fitzhugh, 1989, 2003; Tovar-Hernández & Salazar- Vallejo, 2008) (Fig. 1 K) but they could be interpreted as broadly hooded (but with long tips) in some species (Fig. 1 L). The length of the thoracic uncini handle could also be considered as useful for discriminating between species as this varies from medium length (same length as the distance from main fang to breast) to long (twice the length of the distance from main fang to breast). The thoracic companion chaetae possess a proximal shaft or handle, generally similar in length to the thoracic uncini handle, and a distal membrane that has been described as teardrop-shaped by most authors (Perkins, 1984; Fitzhugh, 1989, 2002, 2003), or as roughly symmetrical (Fitzhugh, 1989; Tovar-Hernández & Salazar-Vallejo, 2006; Giangrande et al., 2007), or as asymmetrical (Knight-Jones, 1997). After studying the position of the small rows of teeth and the orientation of the tip of the distal membrane, we have concluded that the membrane is asymmetrical (Fig. 1 M). There is some variation in the form of the companion chaetae among different species, so this character may be useful from a systematic point of view. Note: generic diagnostic characters have been omitted from species descriptions, In Table 2, we have incorporated the new species into Knight-Jones’ operational “ Groups ”, and we have re-interpreted collar fusion, lappets and presence of pockets for some taxa.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC85B78FC4A50EFFECEF809.taxon	description	Figs 2 A – E, 3, 4 A, B, 5 A	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC85B78FC4A50EFFECEF809.taxon	materials_examined	Material examined. Victoria. HOLOTYPE AM W 13643, off Townsend Point, Corner Inlet, 38 ° 48 ' S 146 ° 33 ' E, 16 Dec. 1976, 1.5 m. PARATYPES AM W 35476 (2 spec., fragment from incomplete spec. on SEM stubs AM M 082 and M 083), same locality. Additional material. Megalomma suspiciens (Ehlers, 1904) ZMUH PE 1304, syntypes (4 spec.), French Pass, New Zealand, 1 m, 1897. Megalomma trioculatum Reish, 1968 USNM 38409, paratypes (2), lagoon side of Engebi Island, Eniwetok Atoll, Marshal Islands, 7 Sep. 1956.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC85B78FC4A50EFFECEF809.taxon	diagnosis	Diagnosis. Species characterized by a combination of the following features: subdistal compound eyes in all except ventralmost radioles, radiolar skeleton with more than 25 cells in transverse section, dorsal margins of collar fused to faecal groove forming flanking pockets on each side, caruncle absent, and inferior thoracic chaetae with progressively tapering distal tip (type B).	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC85B78FC4A50EFFECEF809.taxon	description	Description. Holotype 135 mm long, 5 mm wide; with eight thoracic and 107 abdominal chaetigers. Crown slightly longer than thorax, 15 mm long, with 30 radioles on left side and 28 on right side arranged in two semicircles. External margin of radioles quadrangular (Fig. 2 A, B). Tip of radioles shorter than pinnules (Fig. 2 B). Radiolar skeleton composed of more than 25 cells in transverse section (Fig. 5 A). All radioles except for last two pairs of ventral radioles with a subdistal compound eye, eyes diminishing in size to ventral radioles, spiral in shape on most radioles (although difficult to determine shape in small eyes). Dorsal lips with radiolar appendages as long as two thoracic chaetigers; with three dorsal pinnular appendages each. Caruncle absent. Low smooth keel (thickened and non-lamellate) projecting ventrally between dorsal lips, arising from raised triangular mound situated mid dorsal to dorsal lips. Ventral lips rounded and well developed; parallel lamellae and ventral sacs present (Fig. 2 D). Posterior peristomial collar fused mediodorsally to the faecal groove, with short dorsal lappets equal in length to lateral collar margins, and with shallow dorsolateral U-shaped incisions on both sides forming deep pockets, reaching to second chaetiger (Fig. 2 C); lateral collar margins smooth, and ventrally forming overlapping lappets with rounded anterior margins (Fig. 2 D). Ventral shields quadrangular, separated from the neuropodial tori, all similar in width. First ventral shield longer than the rest, with m-shaped anterior margin (Fig. 2 D). First chaetiger with superior and inferior elongate narrowly hooded notochaetae; superior longer than inferior. Rest of thoracic chaetigers with about 20 elongate narrowly hooded superior chaetae and several irregular rows of broadly hooded inferior notochaetae progressively tapering distally (type B) (Fig. 3 A), in fascicles separated by large lamellate interramal lobe. Neuropodial tori slightly diminishing in width posteriorly. Uncini with around 13 rows of small and similarly sized teeth above main fang (Fig. 3 D), well developed breast, handle about 3.5 times the length of the distance from breast to main fang (Fig. 4 A). Companion chaetae with asymmetrical membrane with most of surface covered with fine teeth (Fig. 3 B, C). Abdominal neuropodia with slender broadly hooded chaetae (Fig. 3 F, G). Abdominal notopodial uncini with crest of teeth similar to thoracic uncini (Fig. 3 E) but with handles half the length of thoracic ones (Fig. 4 B). Pygidium damaged (Fig. 2 E). Tough chitinous tube present, embedded externally with shell fragments. Colour pattern. Body unpigmented, radioles purple, with around three-four irregular broad transverse bands; proximal band most intense and largest, with more irregular patches distally on radioles (Fig. 2 A). Variation. Complete paratype, 95 mm long, 6 mm wide, with eight thoracic and 120 abdominal chaetigers; pygidium damaged. Branchial crown with 30 pairs radioles, 24 pairs with eyes. Incomplete paratype, with eight thoracic and c. 10 abdominal chaetigers. Branchial crown with 25 and 27 radioles in right and left lobes; with subdistal eyes missing from ventralmost 5 – 7 pairs of radioles. Colour pattern similar in all three specimens. Reproductive features. Incomplete paratype with oocytes in the ten anterior abdominal segments (rest of abdominal chaetigers missing).	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC85B78FC4A50EFFECEF809.taxon	etymology	Etymology. The name of this species is given in dedication to Dr Phyllis Knight-Jones in recognition of her great contribution to sabellid taxonomy.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC85B78FC4A50EFFECEF809.taxon	discussion	Remarks. This new species shares some characters with others described from the Indo-Pacific: M. suspiciens (Ehlers, 1904) recorded from New Zealand, and M. multioculatum Fitzhugh, 2002, from Thailand. These characters are the dorsal margins of collar fused to the faecal groove, dorsolateral collar pockets present, and subdistal eyes present on most branchial radioles. Megalomma phyllisae n. sp. and M. suspiciens (Ehlers, 1904) both possess the same type of inferior thoracic chaetae (type B) as well as long-handled thoracic uncini. Furthermore, they share the presence of a smooth, rounded and dorsoventrally-directed “ keel ” between the dorsal lips, a feature observed after examining the types of M. suspiciens and which Tovar-Hernández & Salazar-Vallejo (2008) misinterpreted as a caruncle (p. 1957). Both taxa also lack interramal “ eyespots ” although they were recorded as present in M. suspiciens by Tovar-Hernández & Salazar-Vallejo (2008 p. 1957), probably mistakenly, as they subsequently state these are absent on p. 1961. Megalomma phyllisae n. sp. possesses eyes on most of the radioles but in M. suspiciens they are only present in 8 – 9 of 16 – 18 pairs of radioles (less than half) and the eyes are smaller in the new species. Collar margins have more shallow dorsolateral incisions and deeper pockets compared with those of M. suspiciens, and short dorsal lappets are present in M. phyllisae n. sp. and absent in M. suspiciens. The new species differs from M. suspiciens in the length of the thoracic uncini handles, with approximately 3.5 times the length of the distance from main fang to breast in M. phyllisae n. sp., compared with about twice the length form breast to fang in M. suspiciens (Fig. 4 K), and also in the length of abdominal uncini handles (Figs 4 B, L). Other minor differences include the presence of three pinnular appendages per dorsal lip in M. phyllisae n. sp. compared with a single pinnular appendage in M. suspiciens, the development of the ventral lappets which are long and overlapping in M. phyllisae n. sp. and short and non-overlapping in M. suspiciens, and the relative position of the thoracic ventral shields to the neuropodial tori with obvious gaps between tori and shields in M. phyllisae n. sp. and which abut in M. suspiciens. Megalomma phyllisae n. sp. and M. multioculatum differ by the shape of the inferior thoracic notochaetae type B in the new species and type A in M. multioculatum). Other differences include the number of rows of cells in the radiole structure, with more than 25 in M. phyllisae n. sp. whereas there are four rows of cells in M. multioculatum; and the development of dorsal lappets, low in M. phyllisae n. sp. and absent in M. multioculatum. Another species recorded in the Indo-Pacific that shares similar features is M. trioculatum Reish, 1968, from Marshall Islands, but after reviewing the paratypes (Fig. 2 F – I) there is no doubt that there is a misinterpretation of morphology in the original description of this species. The dorsal margins of collar are clearly separated from the faecal groove, ending laterally and abruptly, and not producing any pockets on the sides (Fig. 2 G). Therefore, M. trioculatum should now be included with those from Knight-Jones’ Group 2 C (Table 2). Megalomma phyllisae n. sp. also is distinguished from M. trioculatum in the shape of the ventral lappets, rounded in M. phyllisae n. sp. and pointed in M. trioculatum (Fig. 2 F, H), and in the length of the thoracic uncini handles (which are much shorter in M. trioculatum). Also, the relative number of radiolar eyes is greater in M. trioculatum as all radioles of the described holotype and the two paratypes examined possess subdistal eyes in all radioles. The number of rows in the radiolar skeleton of M. phyllisae n. sp. is higher than in M. trioculatum which only bears four (Fig. 5 A, G). It also has to be mentioned that M. trioculatum does not show three types of eyes, as stated in the original description; the two paratypes examined possess radiolar eyes only, and these are of two sizes, those in dorsalmost radioles are large and almost surrounding the whole radiole (Fig. 2 I), whereas the remaining radioles bear small eyes, all similar in size. Other Megalomma species resemble the new species in the shape of collar dorsal margins and the presence of eyes in most radioles. Some of these species can be distinguished from M. phyllisae n. sp. by the presence of a caruncle, absent in the new species. These are M. lobiferum (Ehlers, 1904) and M. carunculata Tovar-Hernández & Salazar-Vallejo, 2008. The new species has short dorsal lappets equal in length to lateral collar margins, while other species possess long dorsal lappets. These are M. acrophthalmos (Grube, 1878), M. fauchaldi Giangrande et al., 2007, M. vesiculosum (Montagu, 1815) and M. claparedii (Gravier, 1908) as described by Giangrande and Licciano (2008). Megalomma phyllisae n. sp. is distinguished from M. circumspectum (Moore, 1923) in the arrangement of radiolar eyes which are lacking in some ventral radioles in the new species and present in all radioles in M. circumspectum (Hartman, 1969); thoracic uncini also differ in the two species — uncini handles of M. phyllisae n. sp. are approximately twice as long as those of M. circumspectum.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFCB5B76FCAB57F3FDA8FC8D.taxon	description	Figs 4 C – D, 5 B, 6	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFCB5B76FCAB57F3FDA8FC8D.taxon	materials_examined	Material examined. Western Australia. AM W 35477, (1 spec.), Stn WA 621, north west of West Lewis Island, Dampier Archipelago, 20 ° 33 ' 31 " S 116 ° 38 ' 13 " E, intertidal, coll. P. Hutchings, 26 Jul. 2000. MAGNT W 14008, Roebuck Bay, Broome, 19 ° 04 ' 00 " S 122 ° 16 ' 59 " E, coll. R. J. Hanley and M. Jebb, 29 Aug. 1991 (1 spec. on SEM stub, AM 499). (A) thoracic uncinus; (B) abdominal uncinus. Megalomma cf. acrophthalmos: (C) thoracic uncinus; (D) abdominal uncinus. Megalomma interrupta n. sp.: (E) thoracic uncinus; (F) abdominal uncinus. Megalomma inflata n. sp.: (G) thoracic uncinus; (H) abdominal uncinus. Megalomma sp. 1: (I) thoracic uncinus; (J) abdominal uncinus. Megalomma suspiciens: (K) thoracic uncinus; (L) abdominal uncinus. Scale: 0.1 mm.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFCB5B76FCAB57F3FDA8FC8D.taxon	description	Description. Largest specimen AM W 35477, 30 mm long, 4 mm wide with eight thoracic and 108 abdominal chaetigers (smallest has eight thoracic and 53 abdominal chaetigers). Crown longer than thorax, 9 mm long, with 25 pairs radioles (15 pairs in the small specimen). Outer surface of radioles quadrangular at the base (Fig. 6 B) and rounded distally, with tips shorter than pinnules. Radiolar skeleton composed of 15 – 20 cells in transverse section (Fig. 5 B). Most radioles with subdistal eyes, dorsalmost four pairs appear spiral, and lateral ones large and becoming smaller more ventrally, lacking or missing in 1 – 2 pairs ventralmost radioles. Dorsal lips with radiolar appendages as long as two thoracic chaetigers, pinnular appendages absent. Caruncle absent. Low smooth keel (thickened and non-lamellate) projecting ventrally between dorsal lips, arising from raised triangular mound situated mid dorsal to dorsal lips. Ventral lips rounded and well developed; ventral parallel lamellae and sacs present. Posterior peristomial collar fused mediodorsally to the faecal groove; dorsal lappets present, elongate and spatulate-shaped distally, as long as lateral collar margins, and with dorsolateral U-shaped indentations on both sides forming pockets, reaching to level of second chaetiger (Fig. 6 A); lateral collar margins smooth (Fig. 6 B), and ventrally forming overlapping lappets with rounded anterior margins, with a complete midventral incision (Fig. 6 C). Ventral shields rectangular, all separate from the neuropodial tori (Fig. 6 C), all similar in width. First ventral shield longer than the rest, with m-shaped anterior margin. First chaetiger with superior and inferior elongate narrowly hooded notochaetae; superior longer than inferior (Fig. 6 D). Rest of thoracic chaetigers with two rows of superior elongate narrowly hooded and two rows of inferior broadly hooded notochaetae with progressively tapering tips (type B) (Fig. 6 E); lamella-like lobe present between superior and inferior notochaetal fascicles. Uncini with around 7 – 10 rows of small, similarly sized teeth above main fang (Fig. 6 F, G), well developed breast, handle long, three times the length of the distance from breast to main fang (Fig. 4 C). Companion chaetae with asymmetrical membrane (Fig. 6 H). Abdominal neuropodia with slender broadly hooded chaetae (Fig. 6 I). Abdominal uncini similar to thoracic uncini, with similarly-sized teeth over the main fang but covering more surface area (Fig. 6 J) and with shorter handle (Fig. 4 D). Pygidium with four small lobes, scattered eyespots laterally. Colour pattern. Three regular transverse pigment bands on branchial radioles plus other less regular pigment on pinnules distally. Brown pigment present on anterior dorsum of body and with dark regular patches dorsolaterally on anterior margins of first seven thoracic segments.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFCB5B76FCAB57F3FDA8FC8D.taxon	discussion	Remarks. Of the species recorded in the Indo-Pacific, these described specimens most closely resemble M. multioculatum and M. phyllisae n. sp. in the presence of subdistal eyes on most radioles and with dorsal margins of collar fused to the faecal groove. However, M. cf. acrophthalmos has conspicuous elongated dorsal collar lappets which are absent in M. multioculatum and M. phyllisae n. sp. These three features (pattern of distribution of radiolar eyes, fusion and shape of collar dorsal margins), are shared with the type material described from the Philippines (Grube 1878) and restudied and drawn by Knight-Jones (1997). The chaetae and uncini of specimens from both localities also show similarities: the inferior thoracic chaetae are broadly hooded but with a progressively-tapering hood (type B) and the thoracic uncini have long handles, exceeding twice the distance of main fang to breast. The only specimen available from the type locality (most probably the holotype according to Knight-Jones [1997]) is not in good condition. Because of this reason, identification should be confirmed with additional material from the type locality. However, it is quite possible that the species has a southeast Asian distribution. This species has also been recorded in Sri Lanka (Willey, 1905) as Branchiomma acrophthalmos but this identification has not been confirmed. Other species in the genus described as possessing well developed dorsal lappets are M. fauchaldi (Giangrande et al., 2007) from Belize, M. vesiculosum from England, and M. mushaense and M. nechamae from the Red Sea, all of which also possess radiolar eyes on most radioles, collar fused to the faecal groove and pockets present, although this last feature was not interpreted as such by Knight- Jones (1997). The shape and size of the lappets and the margin of the collar of M. acrophthalmos are all different in shape and size to these four species, and their geographical distributions are discrete and separated widely enough to also separate them as different species.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC55B74FE9C52F4FC3AF96F.taxon	description	Figs 2 J – L, 4 E – F, 5 B, 7, 8	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC55B74FE9C52F4FC3AF96F.taxon	materials_examined	Material examined. Queensland. HOLOTYPE AM W 35478, One Tree Island, 23 ° 30 ' S 152 ° 05 ' E, Stn 10.4, coll. P. A. Hutchings, Oct. 1972. PARATYPES: AM W 35479, (6 spec., 1 on SEM stub AM 501), same locality as holotype; AM W 35480 (1 spec.), Stn 11.2, same locality and date; AM W 35481 (1 spec.), Stn 1.1, same locality and date; AM W 35482 (1 spec.), Stn 5.4, same locality and date; AM W 35483 (2 spec.), Stn 14.3, same locality and date; AM W 35484 (1 spec.), Stn 2.4, same locality and date; AM W 35485 (2 spec.), Stn 10.2, same locality and date; AM W 35486 (1 spec.), Stn 15.1, same locality and date; AM W 35487 (1 spec.), Stn 5.1, same locality and date; AM W 35488 (5 spec., 2 on SEM stubs MI 090 – 91), Stn 10.3, same locality and date; AM W 35489 (1 spec.), Stn 7.1, same locality and date; AM W 35490 (1 spec.), off Station Beach, Lizard Island, 14 ° 41 ' S 145 ° 27 ' E, 75 LIZ 1 – 8, coll. P. B. Berents & P. Hutchings, 6 Jan. 1975, from dead Pocillopora, 3 m; AM W 35491 (3 spec., one on SEM stub), south headland of Turtle Beach, Lizard Island, 14 ° 39 ' S 145 ° 27 ' E, 76 LIZ 21 - 1, coll. P. Berents & P. Hutchings, 27 Aug. 1976, dead branching coral, 3 m; AM W 35492 (1 spec.) off Granite Bluff, Lizard Island, 14 ° 39 ' S 145 ° 27 ' E, 76 LIZ 27 - 1, coll. P. Berents & P. Hutchings, 31 Aug. 1976, thin plates dead coral, 6 m; AM W 35493 (2 spec.), off Coconut Beach, Lizard Island, 14 ° 41 ' S 145 ° 28 ' 27 " E, QLD 1185, coll. K. B. Attwood & P. A. Hutchings, 29 Mar. 1995, dead coral at foot of reef, covered in Lithothamnion, 12 m; AM W 35494 (1 spec.), reef front between Bird & South Islands, Lizard Island, 14 ° 41 ' 53 " S 145 ° 27 ' 51 " E, QLD 1187, coll. P. A. Hutchings, 30 Mar 1995, dead coral, 13 m; AM W 35495 (1 spec.), off North Point Lizard Island, 14 ° 38 ' 51 " S 145 ° 27 ' 12 " E, QLD 1183, coll. P. A. Hutchings, 28 Mar. 1995, dead coral with heavy coralline algal growth, 20 m. Western Australia. AM W 35496 (2 spec.), Kendrew Island, Dampier Archipelago, 20 ° 28 ' 42 " S 116 ° 32 ' E, coll. P. A. Hutchings, 3 Apr. 1987, crevice fauna, 10 m; AM W 35497 (1 spec.), 2 km west of Angel Island, Dampier Archipelago, 20 ° 29 ' 46 " S 116 ° 47 ' 29 " E, WA 639, coll. P. A. Hutchings & L. Avery, 4 Aug. 2000, pinnacle, dead coral substrate & large bivalves heavily encrusted and bored, 10 m; AM W 35498 (3 spec., 2 on SEM stub MI 089 and MI 090), west of Angel Island, 20 ° 29 ' 03 " S 116 ° 47 ' 50 " E, WA 619, coll. P. A. Hutchings & L. Avery, 25 Jul. 2000, dead coral, 6 m; AM W 35499 (2 spec.), East Montlivet Island, Kimberley region, 15 ° 06 ' S 125 ° 18 ' E, Stn 50, coll. P. A. Hutchings, 16 Jul. 1988, 6 m; AM W 35500 (1 spec.), south side of Long Reef, Kimberley region, 14 ° 01 ' S 125 ° 44 ' E, Stn 60, coll. P. A. Hutchings, 18 Jul. 1988, 20 m. Indonesia. MAGNT W 5975 (1 spec., Bay of Maumere, Pasir Sari, 8 ° 37 ' 00 " N 122 ° 13 ' 59 " E, 24 – 27 m, rubble E, coll. B. C. Russell, 6 Nov. 1991. Additional material. Queensland (identification is tentative due to poor preservation): AM W 198006 (2 specimens, 1 on SEM stub MI 086), Calliope River, Gladstone, 23 ° 51 ' S 151 ° 10 ' E, coarse sand, 3.9 m, coll. P. Saenger, Aug. 1982; AM W 198007 (1 spec.), same locality and date, silty sand, 5.6 m.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC55B74FE9C52F4FC3AF96F.taxon	diagnosis	Diagnosis. This species is characterized by a combination of features: radiolar eyes present in dorsalmost and lateral radioles only, with approximately four radioles in between without eyes; radiolar skeleton with approximately 10 cells in cross section; collar margins not fused to the faecal groove, shallow inconspicuous pockets present, caruncle absent, and inferior thoracic broadly hooded chaetae with distal end narrowing abruptly (type A).	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC55B74FE9C52F4FC3AF96F.taxon	description	Description. Holotype 22 mm long and 2.5 mm wide with body flattened dorsoventrally, thorax wider than abdomen and abdominal segments diminishing in size posteriorly. Eight thoracic and 78 abdominal chaetigers. Crown longer than thorax, with 15 radioles in each lobe semicircular lobe. External margin of radioles quadrangular at the base (Figs 2 I, 7 C) and rounded towards the tips, without lateral flanges but with two longitudinal bands of cilia. Tips of radioles tapering, shorter than pinnules (Fig. 2 J). Basal membrane absent. Radiolar skeleton with about 10 cells in transverse section at the base of radioles (Fig. 5 C). Dorsalmost pair of radioles longer than the rest, each with a large subdistal compound eye almost surrounding the whole radiole, and with visible ommatidia (Figs 2 J, 7 K), adjacent next five pairs of radioles without eyes, next two pairs of lateral radioles with small, similarly-sized subdistal eyes. Dorsal lips with radiolar appendages as long as two thoracic chaetigers, with lateral lamellae almost reaching the tip of appendage; three dorsal pinnular appendages each. Caruncle absent. Ventral lips rounded and well developed. Ventral sacs and parallel lamellae present (Fig. 7 A). Collar with pointed ventral lappets (Figs 2 I, 7 A); lateral margins of collar smooth with dorsolateral U-shaped indentations on both sides forming inconspicuous pockets and continuing as ridges to the middorsal faecal groove (Figs 2 I, 7 B – C). Ventral shields quadrangular with parallel lateral margins, not in contact with the neuropodial tori (Figs 2 K, 7 A). First ventral shield longer than the rest, with a midanterior incision (m-shaped anterior margin). First chaetiger with superior and inferior elongate narrowly hooded notochaetae; superior row longer than the inferior one (Fig. 7 D). Rest of thoracic chaetigers with superior elongate narrowly hooded and inferior broadly hooded notochaetae (about 20, type A) arranged in two rows (Fig. 7 H). Notopodia of thoracic chaetigers with elongated lobe between superior and inferior chaetae (Fig. 7 B). Neuropodial tori becoming slightly shorter more posteriorly. Thoracic uncini with several rows of small teeth, all similar in size above main fang (Fig. 7 F, G); uncinus with well developed breast and handle about twice the length of the distance from breast to main fang (Fig. 4 E). Companion chaetae with asymmetrical membrane covered proximally with rows of small teeth (Fig. 7 E). Abdominal neuropodia with elongate, broadly hooded chaetae arranged in two rows (Fig. 7 I). Notopodial abdominal uncini similar to the thoracic (Fig. 7 J) but with shorter handle (Fig. 4 F). Pygidium as a rounded papilla without pygidial eyes. Variation. There is some variability in the number of thoracic chaetigers, with some paratypes having nine or ten. The number of radioles varies between 10 and 18 pairs and phyllisae n. sp.; (B) M. interrupta n. sp.; (C) M. cf. miyukiae; (D) M. inflata n. sp.; (E) Megalomma sp. 1; (F) M. quadrioculatum; (G) M. trioculatum; (H) M. lanigera; (I) M. suspiciens. Scale: 0.1 mm. the number of compound subdistal eyes also differs among specimens and is not related to the number of radioles (Table 1, Fig. 9). All specimens share the same arrangement of a large radiolar eye on each of the dorsalmost radioles, but the small, similarly-sized subdistal radiolar eyes on a few lateral radioles can be absent entirely from some specimens. Dorsal lips bear long radiolar appendages that in some specimens reach the length of four thoracic chaetigers. In all specimens the peristomial collar has dorsal margins separated from the faecal groove, but in some specimens under the dissecting microscope, it is not clear whether pockets are absent or present, as some specimens exhibit low membranes as continuations of the dorsal margins of the collar which could be considered as vestigial pockets (according to Knight- Jones, 1997) (see Fig. 2 M), a feature that is made very clear using scanning electron microscopy (see Fig. 7 B, C). Also, the ventral lappets of the collar may be observed as overlapping or not, depending on whether they are erect or folded back. Specimens show variability in the size of the gap between ventral shields and thoracic tori, even within the same sample. In some specimens (e. g., holotype, paratypes, and AM W 35498) shields and tori are separated by a wide gap, in others (e. g., AM W 35496) they are separated only in posterior chaetigers, while in other specimens they are in contact in all chaetigers (e. g., AM W 35497). After observing the variability within this morphospecies under both dissecting and compound microscopes, some specimens were selected from several different localities covering the species’ distribution and which also displayed the variability in the distribution of radiolar eyes, and these were studied under SEM. Thoracic and abdominal chaetae appear to be similar in shape, size and arrangement within their fascicles (Fig. 8 B, C, F, G, J, M, N) but variability was observed among thoracic and abdominal uncini (Fig. 8 A, D, E, H, I, K, L, O). All specimens have similarly-sized teeth covering half the surface of the main fang in thoracic uncini, and a slightly greater surface area of abdominal uncini, but some specimens show relatively larger teeth (Fig. 7 A, D, E, H, I, K) than others (Fig. 8 L, O); however these differences do not seem to be correlated with the specimens’ differing geographical localities, as variability is observed among specimens from the same sample. Until further studies reveal if this is, in fact, a complex of species that coexist in the same habitats in the same localities, we consider this variability to be intraspecific. Colour pattern. The intensity of the pigmentation varies among the specimens and could be due to different methods or lengths of time of preservation. The specimens from Western Australia are more pigmented in general that those from Queensland (Figs 2 J – M). The thorax is anteriorly pigmented, particularly dorsally and ventrally around tori. The base of the branchial crown is also pigmented, there is a longitudinal medial line basally on each radiole, and some specimens also exhibit irregular, variable-width, transverse bands of pigment on the crown.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC55B74FE9C52F4FC3AF96F.taxon	etymology	Etymology. The name of this species refers to the discontinuous arrangement of eyes on the radioles.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC55B74FE9C52F4FC3AF96F.taxon	discussion	Remarks. These specimens do not fit into the classification proposed by Knight-Jones (1997) as her categories do not consider the combination of the following features: dorsal margins of collar not fused to the faecal groove, pockets present and compound eyes in dorsalmost and also in some lateral radioles. These characters, common to all these specimens, justify the inclusion of a new category (called Group 2 E herein) in Knight-Jones’ classification. The collar pockets could be considered as vestigial or even absent in some specimens and therefore this species should also be compared with those previously placed in the categories 2 B, 2 C and 2 D which also lack dorsolateral collar pockets. The new species resembles M. messapicum Giangrande & Licciano, 2008, from the Mediterranean, in the particular arrangement of compound subdistal radiolar eyes, with a large eye almost surrounding the tip of the dorsalmost radioles, as well as some lateral radioles bearing small, similarly-sized subdistal radiolar eyes, and with those radioles between the dorsalmost and lateral ones lacking eyes (see Table 1). These two species, confined to distant and isolated geographic areas, are distinguished by the difference in the degree of fusion of collar margins with the faecal groove, separated in M. interrupta n. sp. and fused in M. messapicum; moreover M. interrupta n. sp. is characterized by the presence of large interramal lobes in thoracic notopodia and a radiolar skeleton with around 10 cells in transverse section, whereas M. messapicum does not possess enlarged interramal notopodial lobes, and has a radiolar skeleton of four cells in cross-section (Giangrande, pers. comm.).	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC75B6FFCF157BDFDA0FE45.taxon	description	Figs 5 C, 10	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC75B6FFCF157BDFDA0FE45.taxon	materials_examined	Material examined. Northern Territory. MAGNT W 331 (1 spec.), Coral Bay, Port Essington, 11 ° 11 ' 50 " S 132 ° 02 ' 55 " E, collected by D. Staples, 17 May 1983, broken reef, 3 – 5 m; MAGNT W 17354 (1 anterior end on SEM stub, crown in vial), Cullen Bay Marina, Darwin Harbour, 12 ° 27 ' 09 " S 130 ° 49 ' 18 " E, coll. CSIRO CRIMP survey team, 30 Mar. 1999; MAGNT W 17355 (1 detached crown only), same site and collectors; MAGNT W 17356 (1 spec.), Inner Stokes Hill Wharf, Darwin Harbour, S 12 ° 28 ' 13 " S E 130 ° 50 ' 59 " E, coll. CSIRO CRIMP survey team, 16 Aug. 1999. Queensland. AM W 35502 (1 crown + spec. on SEM stub), Lorim Point Wharf, Weipa, 12 ° 40 ' S 141 ° 57 ' E, P 990 WI, coll. CRC Reef Research Centre Ltd, Oct. 1999, from pile scraping, 7 m.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC75B6FFCF157BDFDA0FE45.taxon	description	Description. Only one specimen (MAGNT W 331) complete, the rest are missing posteriors or in poor condition (branchial crown is detached from body). Complete specimen with 10 thoracic and 120 abdominal chaetigers. Crown with 18 radioles on each semicircular lobe. External margin of radioles rounded, without lateral flanges. Tip of radioles digitiform and longer than distal pinnules, except radioles bearing compound eyes, where tip is shorter. Radiolar skeleton with 8 – 10 rows of cells (Fig. 5 C). Three pairs of dorsalmost radioles with subdistal compound eye, with distinct ommatidia, diminishing in size ventrally and with dorsalmost pair of eyes almost surrounding the radiole, leaving a small gap on the outer margin. Dorsal lips with radiolar appendages as long as two thoracic chaetigers. Ventral lips rounded and well developed. Parallel lamellae and ventral sacs present (Fig. 10 A). Caruncle absent. Smooth keel present between dorsal lips (Fig. 10 B). Posterior peristomial collar with rounded dorsal margins and with wide gap between them but with low fleshy ridges that continue obliquely from middorsal faecal groove to vestigial pockets, pockets level with notochaetae of first chaetiger (Fig. 10 B); lateral margins of collar smooth, perpendicular to body axis and covering the junction of thorax and crown; ventral lappets prominent, rounded and overlapping (Fig. 10 A). Ventral shields quadrangular, all similar in width down the body, almost in contact with the neuropodial tori (Fig. 10 A). First ventral shield longer than the rest, with m-shaped anterior margin although not conspicuous. First chaetiger with about 20 superior and inferior elongate narrowly hooded notochaetae, superior longer than inferior. Chaetigers 2 – 8 with about 20 elongate narrowly hooded superior chaetae and 20 – 25 broadly hooded inferior chaetae (Fig. 10 C – E) (type B). Neuropodial tori slightly diminishing in width posteriorly. Thoracic uncini with several rows of small teeth, similar in size, above main fang (Fig. 10 F); uncinus with well developed breast, handle similar in length to the distance from breast to main fang. Companion chaetae with asymmetrical membrane and small teeth covering most of its surface (Fig. 10 H). Neuropodia of anterior abdominal chaetigers with broadly hooded chaetae (Fig. 10 I). Abdominal notopodia with uncini similar to thoracic but with shorter handles (Fig. 10 G). Pygidium bilobed, eyespots absent. Chitinous hard tube (specimen MAGNT W 17356), covered with fine sand on anterior third of length. Variation. The other specimens have eight thoracic chaetigers and 15 – 25 radioles on each branchial lobe. Specimens possess one to three pairs of subdistal radiolar eyes, and some have eyes missing on the third dorsalmost radioles, in which case they are present on the fourth pair; relative size of eyes varies from one specimen to another — in some the two dorsalmost pairs are large and the third pair significantly smaller, while in others the difference in size is more gradual, diminishing ventrally. The specimens also vary in the size of the gap between ventral shields and tori. In some specimens the ventral lappets do not overlap. Colour pattern. Body slightly pigmented anteriorly, particularly the collar, ventral shields, and ventral margins of parapodial tori, although tori unpigmented. Base of crown and anterior margin of peristomium dorsally coloured; radioles with some transverse irregular bands and with some pinnules pigmented.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFC75B6FFCF157BDFDA0FE45.taxon	discussion	Remarks. The identification of this species in Australia should be confirmed with more material in better condition. Some features, such as separation of the dorsal margins of the collar from the faecal groove, the presence of vestigial pockets of the collar and the presence of subdistal eyes in only a few dorsal radioles agree with the original description of M. miyukiae, described from Thailand (Nishi, 1998). But there are some differences between these specimens and the types of M. miyukiae. Vestigial pockets of the collar are present on the specimens described herein, and although we consider this a feature that might be overlooked and interpreted as “ pockets absent ” when there is no fusion of collar with the faecal groove, Nishi (1998) is aware of the possibility of vestigial pockets being present as he states in Remarks when comparing his new species to others, that M. heterops Perkins, 1994, “ has vestigial pockets joining ridges and dorsolateral margins ”, and mentions that only a “ small bulge ” is present on M. miyukiae specimens. In the absence of examination of type material of M. miyukiae, we can only assume that our specimens differ from M. miyukiae in this character. The first ventral shield is not as long as twice the length of the following shields, and also radiolar tips are longer than pinnules except for the ones bearing compound subdistal eyes, but these differences could be due to intraspecific variation. These specimens should also be compared with M. kaikourense, described from New Zealand, as they share some features such as dorsal collar margins not fused to faecal groove, presence of vestigial pockets (according to original description by Knight-Jones, 1997), and eyes on dorsalmost radioles. The differences between the two species are that the specimens from Australia bear eyes on other radioles, and also, using a perhaps more significant species-character, that the inferior thoracic chaetae have progressively tapering distal tips (type B) in the specimens described herein, whereas they narrow abruptly (type A) in M. kaikourense.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDC5B6EFED850A4FD67F905.taxon	description	Figs 4 G, H, 5 D, 11	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDC5B6EFED850A4FD67F905.taxon	materials_examined	Material examined. New South Wales. HOLOTYPE AM W 35503, southeast of Bate Bay, 34 ° 04 ' S 151 ° 13 ' E, coll. by The Ecology Lab for RMI / Pioneer Project, 15 Jan. 1990, 45 – 50 m, Stn RMI C 26. PARATYPES: AM W 35504 (1 spec.), east of Bass Point, 34 ° 36 ' S 150 ° 54 ' E, 25 Jun. – 26 Jul. 1990, 45 – 50 m, Stn RMI BP 51; AM W 35505 (2 spec.), east of Bass Point, 34 ° 36 ' S 150 ° 54 ' E, 3 – 18 Jan. 1991, 65 – 70 m, Stn RMI 4 / 236; AM W 35506 (1 spec.), east of Bass Point, 34 ° 36 ' S 150 ° 54 ' E, 25 Jun. – 26 Jul. 1990, 45 – 50 m, Stn BP 43; AM W 23057 (1 spec. on SEM stub), east of Bass Point, 34 ° 36 ' S 150 ° 54 ' E, coll. by The Ecology Lab for RMI / Pioneer Project, 1 Feb. 1990, 25 – 50 m. AM W 35753 (1 spec.), south of Batemans Bay, south side of Burrewarra Point, 35 ° 50 ' 16 " S 150 ° 14 ' 05 " E, 28 Mar. 2004, 17 m, from algal and bryozoan (cf. Amathia) turf on vertical rock face, coll. Australian Museum party, Stn NSW 2631. Additional material. Megalomma quadrioculatum, holotype ZMUH PE 1303, Aripu Coral Reef, Sri Lanka, coll. Willey, 1905.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDC5B6EFED850A4FD67F905.taxon	diagnosis	Diagnosis. The synapomorphy of this species is the presence of an inflated peristomium protruding from collar. Moreover, M. inflata n. sp. is characterized by a combination of characters: dorsalmost radioles with large subdistal compound eyes and occasionally one or two small pairs in following radioles, radiolar skeleton with around 10 cells in transverse section, dorsal margins of collar fused to the faecal groove forming broad and U-shaped pockets on each side, caruncle absent, and thoracic inferior chaetae with tips progressively tapering (type B).	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDC5B6EFED850A4FD67F905.taxon	description	Description. Holotype complete and in good condition measuring 22 mm long and 2 mm wide, with eight thoracic chaetigers and 37 abdominal chaetigers. Crown longer than thorax, with 14 pairs of radioles arranged in two semicircular lobes. External margin of radioles quadrangular, lateral flanges absent (Fig. 11 A), skeleton with 8 – 10 cells in transverse section (Fig. 5 D). Tip of radioles digitiform and shorter than pinnules (Fig. 11 A). Three pairs of dorsalmost radioles with a subdistal compound eye and an extra fourth eye on the right side, with distinct ommatidia, eye-size diminishing ventrally; dorsalmost eyes spiral, almost surrounding radioles. Dorsal lips with radiolar appendages shorter than two thoracic chaetigers and no visible pinnular appendages. Ventral lips rounded and well developed. Ventral sacs present. Caruncle absent. Short smooth keel present. Posterior peristomial collar with rounded dorsal margins fused to faecal groove, dorsal collar lappets absent (Fig. 11 C); collar pockets present, low due to deep incision (dorsal peristomium inflated and dorsal collar difficult to discern) (Fig. 11 C); lateral margins of collar smooth, ventral lappets prominent, pointed and not overlapping (Fig. 11 B, C). Ventral shields quadrangular, separated from the neuropodial tori, all similar in width (Fig. 11 B). First ventral shield longer than the rest, with m-shaped anterior margin although not conspicuous. First chaetiger with superior and inferior elongate narrowly hooded chaetae, superior longer than inferior (Fig. 11 D). Rest of thoracic chaetigers with elongate narrowly hooded superior chaetae and broadly hooded inferior notochaetae with tips progressively tapering (type B) (Fig. 11 E, G). Neuropodial tori slightly diminishing in width posteriorly. Thoracic uncini with several rows of small teeth, similar in size, above main fang (Fig. 11 H); uncinus with well developed breast, handle twice length of the distance from breast to main fang (Fig. 4 G). Companion chaetae with asymmetrical membrane and teeth covering about half the length (Fig. 11 I). Neuropodia of anterior abdominal chaetigers with narrowly hooded chaetae (Fig. 11 F). Notopodia with uncini similar to thoracic uncini (Fig. 11 J) but with shorter handles (Fig. 4 H). Pygidium trilobed from ventral view, as a rounded papilla from dorsal view, with scattered eyespots laterally. Tube made of a thin and flexible layer of mucus covered by a mixture of fine sediment and mud. Variation. The paratypes range in size from 10 – 25 mm in length. The number of pairs of radioles varies from eight to ten. They possess one to two pairs of radiolar eyes (although the holotype possesses 3 pairs plus an extra eye on one side). One paratype (from AM W 35505) also possesses dark, slightly inflated spots on the inner subdistal sides of most of the rest of the radioles (excluding the ventralmost three pairs) which could be incipient eyes. However, ommatidia could not be detected, and these therefore may just be pigmented areas. Colour pattern. Pigment occurs at the base of radioles and in a few transverse irregular bands in radioles and pinnules. Body unpigmented.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDC5B6EFED850A4FD67F905.taxon	etymology	Etymology. The name of this species is related to the conspicuously inflated peristomium. This feature is unique among other Megalomma species.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDC5B6EFED850A4FD67F905.taxon	discussion	Remarks. This new species displays similar features to another species described in the Indo-Pacific area, M. cinctum from Taiwan — the fusion of dorsal collar margins to the faecal groove, the presence of dorsolateral pockets and the distribution of compound eyes in 1 – 3 dorsalmost pairs of radioles (this is if the spots found in one specimen are not considered as eyes). However M. inflata n. sp. is distinguished from M. cinctum by the conspicuous inflation of the peristomium shown in all the specimens, the deep U-shaped dorsolateral incisions of the collar (absent in M. cinctum), the presence of well-developed ventral sacs (absent in M. cinctum) and the narrowly hooded shape of the inferior thoracic chaetae (or at least slender and thin), but broadly hooded (type A) in M. cinctum. There are species described from several localities around the world that share with this new species some features such as the development and shape of collar dorsal margins, collar margins fused to the faecal groove, the presence of pockets, eyes present on one to three dorsalmost pairs of radioles, and the absence of a caruncle. These are M. coloratum (Chamberlin, 1919) from California, M. modestum (de Quatrefages, 1866) from Peru, M. roulei (Gravier, 1908) and M. splendidum (Moore, 1905). None of these species have an inflated peristomium, nor are their collar pockets as broad and U-shaped as M. inflata n. sp. Another species described from the Indian Ocean and which shares some features with M. inflata n. sp. is M. quadrioculatum (Willey, 1905) but examination of the holotype for this review revealed the presence of a large caruncle, which is absent in the new species.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDD5B6CFED85647FB03FCAB.taxon	description	Figs 2 N – Q, 4 I, J, 5 E	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDD5B6CFED85647FB03FCAB.taxon	materials_examined	Material examined. Queensland. AM W 30022 (1 spec.), Abbott Point, near Bowen, 19 ° 53 ' S 148 ° 05 ' E, coll. by CRC Reef Research Centre Ltd for Queensland Ports Survey, from pylon scraping, 8 Jul. 1998, 7 m.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDD5B6CFED85647FB03FCAB.taxon	description	Description. Single specimen complete, measures 74 mm long (18 mm crown) and 5 mm wide. Crown longer than thorax, with 22 pairs of radioles in each lobe, arranged in a semicircle. External margin of radioles quadrangular at the base and rounded towards the tips (Fig. 2 N, O, Q), without lateral flanges. Tips of radioles shorter than pinnules (Fig. 2 Q). Radiolar skeleton with 15 – 20 cells in transverse section at the base of radioles (Fig. 5 E). More than half (18 – 19) of the radioles with single subdistal compound eyes. Dorsalmost pair of radioles with large eye almost surrounding the tip of radiole, not spiral (Fig. 2 Q); on adjacent radioles bearing subdistal eyes, eyes small and spherical, similar in size. Dorsal lips with radiolar appendages as long as two thoracic chaetigers, lateral lamellae not reaching the tip of appendage, three dorsal pinnular appendages on each lip. Ventral lips rounded and well developed; parallel ventral lamellae and ventral sacs present. Caruncle absent. Smooth keel arising dorsally and directed ventrally between dorsal lips (Fig. 2 O). Dorsal margins of collar fused to the faecal groove, with dorsolateral V-shaped notches on both sides and shallow dorsolateral pockets becoming a shallow groove more dorsally (Fig. 2 O); lateral margins smooth (Fig. 2 P), triangular non-overlapping ventral lappets, with a complete midventral incision (Fig. 2 N). Ventral shields quadrangular with indented margins laterally, slightly diminishing in width posteriorly, in contact with the neuropodial tori, except in anterior chaetigers (Fig. 2 N). First ventral shield 1.5 times longer than the rest, with an m-shaped anterior margin (Fig. 2 N). First chaetiger with superior and inferior elongate narrowly hooded notochaetae, superior row longer than inferior. Rest of thoracic chaetigers with superior elongate narrowly hooded notochaetae arranged in irregular rows and inferior broadly hooded notochaetae (type B) in single row. Notopodia of thoracic chaetigers with a large lamellate lobe separating inferior and superior fascicles of notochaetae. Neuropodial tori becoming slightly shorter posteriorly. Thoracic uncini with several rows of small teeth, all similar in size above main fang; uncinus with well developed breast and handle about twice the length of the distance from breast to main fang (Fig. 4 I). Companion chaetae with asymmetrical membrane. Abdominal neuropodia with broadly hooded chaetae. Notopodial uncini similar to thoracic uncini but with handles half their length (Fig. 4 J). Posterior chaetigers regenerating, pygidium papilla-like, with scattered eyespots present. Reproductive features. Eggs present in anterior abdominal segments. Colour pattern. Crown and thorax with purple pigmentation after fixation. There are some conspicuous dark spots located on the ventral margin of the thoracic tori which we do not consider to be eyespots, as the patches are not discrete (pigment dilutes dorsally along tori edges) and they are also not interramal as in other sabellids that display segmental eyespots.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDD5B6CFED85647FB03FCAB.taxon	discussion	Remarks. This specimen does not fit the description of any previously described species but it is premature to describe it as new until more specimens are found and intraspecific variability can be assessed. The combination of such characters as margins of collar not fused to the faecal groove (although there is a ridge that continues from the end of the dorsal margins to where the middorsal faecal groove ends, which could be interpreted as fusion with the faecal groove), U-shaped dorsolateral incisions of the collar, the presence of low collar pockets, and subdistal eyes on most radioles makes the specimen similar to several other species previously described from the Indo-Pacific: M. multioculatum, from Thailand and M. pacificum from Gilbert Islands. However, M. multioculatum is described as having collar margins fused to the faecal groove and pockets present, and the latter species has been possibly referred to Demonax by Fitzhugh (2002). The specimen described above differs from M. multioculatum also in the development of the collar, as the ventral lappets are shorter, not visibly longer than lateral margins, but are elongate in M. multioculatum, in which the dorsal margins of collar are clearly fused to the faecal groove and there are shallow pockets present on both sides. Also, the specimen from Queensland has inferior thoracic chaetae arising in a single row and with progressively tapering tips (type B) while M. multioculatum has chaetae with broader and more slender tips (type A). The handles of thoracic uncini are also shorter in the Queensland specimen. According to Tovar-Hernández and Salazar-Vallejo (2008), there are three species described as having the dorsal margins of collar not fused to the faecal groove, pockets present and radiolar eyes in most radioles (which have been previously placed in Group 2 B). One of these, M. neapolitanum Claparède, 1868, described from Italy, has been recently synonymized with M. lanigera (Grube, 1846) (Giangrande & Licciano, 2008). The other two, M. heterops and M. perkinsi Tovar-Hernández & Salazar- Vallejo, 2006, were described from Florida. The specimen described above differs from M. heterops in the shape of the inferior thoracic chaetae which are broader in the base and thinner in the tip, bottle-shaped, and the thoracic uncini handles which are significantly shorter. According to the drawings and original description, M. perkinsi has lateral and dorsal anterior margins of the collar similar in length, and the collar fused to the faecal groove, features not shared by the specimen described above.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDF5B6BFC7852FCFDB4FE60.taxon	description	Fig. 12	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDF5B6BFC7852FCFDB4FE60.taxon	materials_examined	Material examined. Victoria. MV F 70842 (1 spec. on SEM stub AM 500), eastern Bass Strait, 8.6 km west southwest of Cape Conran, 37 ° 51 ' 11 " S 148 ° 38 ' 32 " E.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDF5B6BFC7852FCFDB4FE60.taxon	description	Description. Single specimen incomplete, with eight thoracic chaetigers and five abdominal chaetigers. Crown with ten pairs of radioles, arranged in semicircles. External margins of radioles quadrangular, without lateral flanges (Fig. 12 A, B). Tips of radioles shorter than pinnules. Subdistal eyes present on the two dorsalmost pairs of radioles; dorsalmost pair larger and almost surrounding the radiolar tip (Fig. 12 C). Ventral lips rounded and well developed; ventral parallel lamellae and ventral sacs present. Dorsal margins of collar not fused to the faecal groove, terminating dorsolaterally and leaving a wide gap between them (Fig. 12 A, B); collar pockets absent; lateral margins smooth, oblique; elongate, triangular, non-overlapping ventral lappets, with a complete midventral incision. Ventral shields quadrangular, similar in length along thoracic chaetigers, almost in contact with tori. First ventral shield with a straight anterior margin. First chaetiger with superior and inferior elongate narrowly hooded notochaetae; superior row longer than the inferior (Fig. 12 D). Rest of thoracic chaetigers with superior elongate narrowly hooded notochaetae and inferior broadly hooded notochaetae with tips decreasing in width progressively, arranged in two rows (Fig. 12 G). Thoracic uncini with several rows of small teeth, all similar in size, above main fang (Fig. 12 E), uncinus with well developed breast. Companion chaetae with asymmetrical membrane and small teeth covering most of surface but with smooth distal tip (Fig. 12 F). Abdominal neuropodia with broadly hooded chaetae (Fig. 12 I). Abdominal uncini similar to thoracic (Fig. 12 H) but with shorter handles. Pygidium missing.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
2202BF4FFFDF5B6BFC7852FCFDB4FE60.taxon	discussion	Remarks. Megalomma sp. 2 resembles most closely M. cf. miyukiae specimens described herein, in the development of the collar (with dorsal collar margins separated from the faecal groove), in the presence of radiolar eyes in the dorsalmost radioles, and in the absence of a caruncle, but these two species are distinguished by the shape of the collar margins, which end abruptly in Megalomma sp. 2, and form concave ends with low pockets in M. cf. miyukiae. Moreover ventral shields are separated from tori in this specimen, whereas these abut in M. cf. miyukiae.	en	Capa, María, Murray, Anna (2009): Review of the Genus Megalomma (Polychaeta: Sabellidae) in Australia with Description of Three New Species, New Records and Notes on Certain Features with Phylogenetic Implications. Records of the Australian Museum 61 (2): 201-224, DOI: 10.3853/j.0067-1975.61.2009.1529, URL: http://dx.doi.org/10.3853/j.0067-1975.61.2009.1529
