Enoploceras
Encyclopedia
Enoploceras is a Tainoceratid
genus, a nautiloid cephalopod in the order Nautilida
, known from Triassic sediments in Europe, India, Timor, and the state of Idaho.
Enoploceras is charactersed by its moderately involute shell with a broad subquadrarte 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 growrth 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.
Tainoceratidae
The Tainoceratidae is a family of late Paleozoic and Triassic nautiloids that are a part of the order Nautilida, characterized by large, generally evolute shells with quadrate to rectangular whorl sections...
genus, a nautiloid cephalopod in the order Nautilida
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 Allonautilus, with six species...
, known from Triassic sediments in Europe, India, Timor, and the state of Idaho.
Enoploceras is charactersed by its moderately involute shell with a broad subquadrarte 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 growrth 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
Anoploceras
Anoploceras is a Middle and Upper Triassic nautiloid included in the Tainoceratidae, known from eastern Europe. The shell is evolute with only a slight overlap of previous whorls. Whorl section is subquadrate, like Pleuronautilus, only depressed. Flanks have conspicuous ribs that may be somewhat...
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, Part K. Geological Soc. of America and University of Kansas press. Teichert and Moore (eds)