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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 sinuous. ''Holconautilus'' has a more rounded venter, and flanks, and is more evolute. ''Enoploceras'' has weaker ribs that expand into nodes on the umbilical and ventro-lateral shoulders, and a small umbilical perforation. ''Encoiloceras'' has strong ribbing, a large umbilical perforation, and a shallow groove along the venter. ==''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)
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