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Taxonomy
Ceratocephale abyssorum (Hartman & Fauchald, 1971)
Nomenclature
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Subfamily: GymnonereidinaeGenus: Ceratocephale
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Synonyms: 1
Media
SUMMARY
Prostomium with anterior margin indented. Longest tentacular cirri extend back to chaetiger 1–2. Maxillary ring of pharynx without paragnaths. Oral ring papillae present; solitary; 6–8 papillae present in total. Area V papillae present; 0–2 papillae; VI papillae absent; VII-VIII papillae present. Comprising a single row. 0–6 papillae. Oral ring paragnaths absent. In Ceratocephale spp, Area V and VI contain up to 3 papillae in total; these are here interpreted as all occurring in Area V, with VI=0,0. Transverse dorsal lamellae present (as ridges, in larger specimens on anterior segments). Prechaetal notopodial lobe present. Dorsal cirrus length about 1.5–2 times ventral notopodial ligule at chaetiger 10-20. Neuropodial postchaetal lobe absent. Ventral neuropodial ligule on posterior chaetigers reduced, up to half length of acicular neuropodial ligule. Ventral cirri paired. Commencing chaetiger 1. Notopodial homogomph spinigers present; sesquigomph spinigers present. Notopodial homogomph falcigers absent. Neuropodial dorsal fascicle fused falcigers absent