Shuranoceras
Introduction '''''Shuranoceras''''' is a genus in the extinct oncocerid family Karoceratidae that plied the shallow sea floor from the Early Silurian to the Early Devonian. ''Shuranoceras'' is characterized by a smooth, compressed, slowly enlarging orthoconic shell with a ventral submarginal siphuncle composed of complex segments. ''Shuranoceras'' was found in middle Silurian strata in Ferghana, central Asia.Oncocerids (Order Oncocerida) were nautiloid cephalopods that lived during the early part of the Paleozoic Era. They are closely related to the Nautilids that include the living ''Nautilus'', but on a different evolutionary branch.
See also * Nautiloid** List of nautiloids
References * Sweet, W.C. 1964; Nautiloidea—Oncocerida, in the Treatise on Invertebrate Paleontology; 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)