Ceratocephale setosa
Prostomium with anterior margin indented. Longest tentacular cirri extend back to chaetiger 1–3. Maxillary ring of pharynx without paragnaths. Oral ring papillae present; solitary; 8–10 papillae present in total. Area V papillae present; 3 papillae; VI papillae absent; VII-VIII papillae present. Comprising a single row. 5–7 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; commencing chaetiger 10 (continuing to at least chaetiger 20). Prechaetal notopodial lobe present (exceeding dorsal notopodial ligule). Dorsal cirrus length about 2.5 times ventral notopodial ligule at chaetiger 10-20. Neuropodial postchaetal lobe present, at least on some anterior chaetigers. Ventral cirri paired. Commencing chaetiger 3. Notopodial homogomph spinigers present; sesquigomph spinigers absent. Notopodial homogomph falcigers absent. Neuropodial dorsal fascicle fused falcigers absent.
Vic: Western Port: Crib Point, 3 m, 1 Apr 1965, MV F54173; supplemented by data from Hutchings & Reid, 1990 Table 8. Size range of material examined 24–54 chaetigers. 7–15 mm long. 1–1.5 mm wide
Distinguished from other Australian Nereididae by: Transverse dorsal lamellae Present; Expanded dorsal cirrophores commencing on chaetigers 11; Area V papillae; count 3 papillae. Distinguished from other Ceratocephale spp by: Homogomph spinigers absent; Expanded dorsal cirrophores commencing on chaetigers 11.
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.