''Enoploceras'' is a Tainoceratid genus, a

nautiloid Nautiloids are a group of cephalopods (Mollusca) which originated in the Late Cambrian and are represented today by the living ''Nautilus'' and ''Allonautilus''. Fossil nautiloids are diverse and species rich, with over 2,500 recorded species. Th ...

cephalopod in the order

Nautilida The Nautilida constitute a large and diverse order of generally coiled nautiloid cephalopods that began in the mid Paleozoic and continues to the present with a single family, the Nautilidae which includes two genera, ''Nautilus'' and ''Allonauti ...

, known from Triassic sediments in Europe, India, Timor, and the state of Idaho. ''Enoploceras'' is characterised by its moderately involute shell with a broad subquadrate whorl section; venter and flanks flattened; ventral and umbilical shoulders sharply rounded; flanks with nodes at ventral or umbilical shoulders or both, and with radial ribs and sinuous growth lines; umbilicus deep, straight walled, and with small perforation. The siphuncle is subcentral. Sutures form shallow lobes on the venter, flanks and dorsum. ''Enoploceras'' is like '' Anoploceras'' in that both have a broad subquadrate, wider than high, whorl section but differs in that ''Anoploceras'' has conspicuous ribs while ''Enoploceras'' has primarily nodes.

References

*Bernhard Kummel, 1964. Nautiloidea-Nautilida.

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ...

, Part K. Geological Soc. of America and University of Kansas press. Teichert and Moore (eds) {{Taxonbar, from=Q5379402 Nautiloids Prehistoric nautiloid genera