Jangziceras
Introduction '''''Jangziceras''''' is a genus of fossil nautiloid cephalopods from the Middle Silurian of southern China belonging to the Orthocerida incertae sedis, its familial association undetermined. The type is ''Jangziceras sichuanense'' Lai Chai-Geen . Its description falls within the characters of the Orthocerida. ''Jangziceras sichuanense'' was found in the Middle Silurian (Telychian) Lojoping Formation in Sichuan and Guizhou Provinces associated with orthoderids such as ''Sichuanaceras'' and ''Neosichuanoceras'' and oncocerids such as ''Oocerina'' and ''Guangyuanoceras'' among other nautiloid genera in reefal environments
References *  Ordovician and Silurian Cephalopdos from Hanzhung and Ningkiang of Shensi Lai Chai-Geen *   Biostratigraphy of China Wen-tang Zhang, Pei-ji Chen, A. R. Palmer   * 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)