Ceratocephale Malmgren, 1867

Dataset
GBIF Backbone Taxonomy: Rank
GENUS: Published in
Malmgren, A.J. Annulata Polychaeta Spetsbergiæ, Grœnlandiæ, Islandiæ et Scandinaviæ. Hactenus Cognita. Ex Officina Frenckelliana, Helsingforslæ. 127 pp. & XIV plates (1867).

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Classification

kingdom
Animalia: phylum
Annelida: class
Polychaeta: order
Phyllodocida: family
Nereididae: genus
Ceratocephale

diagnostic

Distinguished from other Nereididae genera by: Transverse dorsal lamellae Present; Area VI papillae Absent (Wilson, RS, Bakken, T & Glasby, CJ 20014. Nereididae (Polychaeta)–A DELTA database of genera, and Australian species. 2nd edition. 1st edition previously published In RS Wilson, PA Hutchings & CJ Glasby (eds) Polychaetes: An Interactive Identification Guide. CSIRO Publishing, Melbourne.)

general

Prostomium with anterior margin indented. Maxillary ring of pharynx without paragnaths. Oral ring papillae present; solitary. Area V papillae present; 3 papillae (close togetehr); VI papillae absent; VII-VIII papillae present. Comprising a single row. 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 (in all species except C.abyssorum); commencing chaetiger 4–10. Prechaetal notopodial lobe present. Neuropodial postchaetal lobe present, at least on some anterior chaetigers. Ventral neuropodial ligule on posterior chaetigers reduced, up to half length of acicular neuropodial ligule. Ventral cirri paired. Commencing chaetiger 1–3. Notopodial homogomph spinigers present; sesquigomph spinigers present, or absent. Notopodial homogomph falcigers absent. Neuropodial dorsal fascicle fused falcigers absent.

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.

Name

Synonyms: Ceratocephala Malmgren, 1867; Ceratophale; Chaunorhynchus Chamberlin, 1919; Pisionura Hartman & Fauchald, 1971
Homonyms: Ceratocephale Malmgren, 1867

Bibliographic References

Banse, Karl. (1977). Gymnonereidinae new subfamily: the Nereididae (Polychaeta) with bifid parapodial neurocirri. Journal of Natural History. 11(6): 609-628.
Bellan, G. (2001). Polychaeta, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels. 50: 214-231.
CoL2006
Fauchald, K. (1977). The polychaete worms, definitions and keys to the orders, families and genera. Natural History Museum of Los Angeles County: Los Angeles, CA (USA), Science Series. 28:1-188.
Fauchald, K., 1977: The polychaete worms: Definitions and keys to the orders, families, and genera. Natural History Museum of Los Angeles County, Science Series 28. 190.
Hansson, H.G. (2014-03-17 00:00:00) NEAT (North East Atlantic Taxa): South Scandinavian marine Annelida Check-List. Internet pdf Ed.
Hartmann-Schröder, G. (1996)
Malmgren, A.J. (1867). Annulata Polychaeta Spetsbergiæ, Grœnlandiæ, Islandiæ et Scandinaviæ. Hactenus Cognita. Ex Officina Frenckelliana, Helsingforslæ. 127 pp. & XIV plates.
Neave, Sheffield Airey. (1939-1996). Nomenclator Zoologicus vol. 1-10 Online. [developed by uBio, hosted online at MBLWHOI Library].
SN2000/Hartmann-Schröder, 1996
SN2000/Hartmann-Schröder, 1996
Wilson et al 2003
WoRMS (Mar 2013)
WoRMS (Mar 2013)