Sholakoceras

Sholakoceras Temporal range: L Permian
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Nautiloidea
Order:	Nautilida
Family:	†Rhiphaeoceratidae
Genus:	†Sholakoceras Ruuzhentsev & Shimanskiy, 1954

Sholakoceras is an extinct genus of nautiloid cephalopods from the Lower Permian of southern Russia, included in the Tainoceratacean family Rhiphaeoceratidae, (order Nautilida). The shell of Shalakoceras is evolute with a perforate (see through) umbilicus. Whorl sections are subquadrate with the ventral and lateral sides flattened and ventral and umbilical shoulders rounded. Lateral areas bear short, slightly oblique ribs. sutures form broad ventral saddles with a slight, shallow lobe, very shallow lateral lobes, and a deep funnel-shaped dorsal lobe.

See also

• List of nautiloids

References

• Kummel, B 1964. Nautilioidea - Nautilida, in the Treatise on Invertebrate Paleontology, Part K ; Geological Society of America and University of Kansas press
• Sepkoski, J.J. Jr. 2002. A compendium of fossil marine animal genera. D.J. Jablonski & M.L. Foote (eds.). Bulletins of American Paleontology 363: 1–560. Sepkoski's Online Genus Database (CEPHALOPODA)