Ceratocephale oculata
Distribution:
North America, Atlantic coast, or South America, Atlantic coast
Depth Range:
10–1007 metres
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Home » Taxonomy » Annelida » Polychaeta » Errantia » Phyllodocida » Nereidiformia » Nereididae » Gymnonereidinae » Ceratocephale » Ceratocephale oculata - Banse, 1977
Taxonomy
Ceratocephale oculata Banse, 1977
Ceratocephale oculata
General description:Prostomium with anterior margin indented. Longest tentacular cirri extend back to chaetiger 5–7. Maxillary ring of pharynx without paragnaths. Oral ring papillae present; solitary. Oral ring paragnaths absent. Transverse dorsal lamellae present; commencing chaetiger 4. Prechaetal notopodial lobe present. Dorsal cirrus length about 2–3 times ventral notopodial ligule at chaetiger 10-20. Neuropodial postchaetal lobe present, at least on some anterior chaetigers. Ventral cirri paired. Commencing chaetiger 1. Notopodial homogomph spinigers present; sesquigomph spinigers absent. Notopodial homogomph falcigers absent. Neuropodial dorsal fascicle fused falcigers absent.
Data sources:no specimens examined, based on Banse, 1977; Taylor, 1984; Hutchings & Reid, 1990 Table 9.
Diagnostic description:Distinguished from other Ceratocephale spp by Longest tentacular cirri extend back to chaetiger 5-7; transverse dorsal lamellae from chaetiger 4
Morphology:The following characters states are implicit in all Nereididae species unless indicated otherwise in the description below:
Maxillary ring of pharynx without papillae. Maxillary ring divided into discrete Areas. Maxillary ring of pharynx with paragnaths; paragnaths arranged in discrete areas; Areas II, III and IV paragnaths not in regular comb-like rows (but may be arranged in irregular rows). Area I minute rod-like paragnaths in a compact cluster absent; II minute rod-like paragnaths in a compact cluster absent; pectinate paragnaths absent; minute rod-like paragnaths in a compact cluster absent; pectinate paragnaths absent; minute rod-like paragnaths in a compact cluster absent; smooth bar-like paragnaths absent; pectinate paragnaths absent. Oral ring papillae absent. Ring of oral ring paragnaths present as irregular rows, not crown-shaped. Smooth bars absent; pectinate rows absent; pectinate paragnaths absent; arranged in one or more irregular lines forming a continuous band; Area VII-VIII paragnaths similar in size, or irregular mix of large and small paragnaths in a single band. Transverse dorsal lamellae absent.
Dorsal notopodial ligule not markedly elongate on posterior chaetigers. Not markedly broader on posterior chaetigers.
Ventral cirri single.