''Baeopleuroceras'' is a genus included in the Barrandeoceroid family Nephriticeratidae, found in

Middle Devonian In the geological timescale, the Middle Devonian epoch (from 393.3 ± 1.2 million years ago to 382.7 ± 1.6 million years ago) occurred during the Devonian period, after the end of the Emsian age. The Middle Devonian epoch is subdivided into two ...

sediments in eastern North America (NY, Penn, Ont.) The shell of ''Baeopleuroceras'' is a short, rapidly expanding cyrtocone, curved through at least 90 degrees. The body chamber is one half the overall shell length. The

siphuncle The siphuncle is a strand of biological tissue, tissue passing longitudinally through the mollusc shell, shell of a cephalopod mollusc. Only cephalopods with chambered shells have siphuncles, such as the extinct ammonites and belemnites, and the li ...

is subcentral with segments slightly expanded into the chambers. '' Rhadinoceras'' and '' Nephriticeras'' are somewhat similar genera from within the Nephriticeratidae, except that in both the

is displaced between the center and the dorsum.

References

* Walter C. Sweet, 1974. Nautiloidea-Barrandeocerida.

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 Mollusca 3. Geological Society of America and University of Kansas Press.
Baeopleuroceras
brief in Paleodb, 6/20/12 Tarphycerida Prehistoric nautiloid genera {{paleo-nautiloidea-stub