Megalomma fauchaldi
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Ordo: Sabellida
Familia: Sabellidae
Genus: Megalomma
Name
Megalomma fauchaldi Giangrande, Adriana, 2007 – Wikispecies link – Pensoft Profile
- Megalomma fauchaldi Giangrande, Adriana, 2007, Zootaxa 1650: 46-47.
Materials Examined
Material examined.Type material: Holotype, on Thalassia at 3 m, on lagoon side of CBC, collected in November 2005, MNCN16.01 / 11018 (sample CBC-KF 1012). Paratypes, one specimen from the same locality USNM1102753; two specimens from the same locality PCZL.
Description
Description.Holotype specimen complete with 8 thoracic and 58 abdominal chaetigers. Body length 20 mm, width 3 mm. Crown length 7 mm; 14–15 pairs of radioles in each lobe with three brown bands. Subterminal compound eyes on seven pairs of radioles. Dorsalmost radioles bearing larger eyes and small tip beyond the eye spot (Fig. 2 D). The others with smaller eyes and longer tips (Fig. 2 E). Dorsal lips long with broad base, with brown pigment (Fig. 2 A), radiolar appendage present, long, 1 / 4 of length of radioles. Ventral lips with parallel lamellae. Dorsal margin of collar fused to faecal groove and forming two very deep pockets, clearly visible. Base of collar dorsally completely enveloping first chaetiger and extending to second chaetiger (Fig. 2 A, B). Collar slightly higher ventrally with poorly developed lappets (Fig. 2 C). Ventral shield of first chaetiger quadrangular, following shields rectangular (Fig. 2 C). Chaetiger 3 with four superior thoracic notochaetae elongate narrowly hooded. Inferior thoracic notochaetae broadly-hooded, resembling paleate chaetae and arranged in two rows, 10 present in chaetiger 3 (Fig. 2 F). Thoracic neuropodia widely separated from ventral shield (Fig. 2 C), neurochaetae avicular with well developed breast (Fig. 2 G), up to 20 uncini on chaetiger 1, and 14 on last thoracic neuropodia. Companion chaetae with roughly symmetrical tips, with teardropshaped membrane (Fig. 2 H). Abdominal neurochaetae arranged in two rows, anterior row with elongate, narrowly hooded chaetae and modified, elongate, narrowly-hooded chaetae in posterior row, about 7 per row. Abdominal uncini avicular with manubrium shorter than present on thoracic uncini, about 14 present per torus on mid abdominal segments. Tube encrusted with shell and sand.
Discussion
Remarks. The number of chaetae and neurochaetal uncini is variable along the body of all material examined. The number of superior thoracic chaetae ranges from 4 to 7, the number of inferior thoracic chaetae from 3 to 10, the number of thoracic uncini from 14 to 20, and the number of abdominal chaetae from 5 to 7, in each row.
Materials Examined
Type locality: Carrie Bow, Belize.
Etymology
Etymology: This species is named in honour of Kristian Fauchald as a tribute of his major contribution to polychaete systematics, his kindness and long friendship with us, and facilitating our visit the CBC.
Taxon Treatment
- Giangrande, Adriana; Licciano, Margherita; Gambi, Maria Cristina; 2007: A collection of Sabellidae (Polychaeta) from Carrie Bow Cay (Belize, western Caribbean Sea) with the description of two new species, Zootaxa 1650: 46-47. doi
This treatment was originally uploaded by Plazi, compare this treatment on Plazi. Unless this treatment has been substantially changed on Species-ID, Plazi requests to maintain a link back to the original repository.
