The Aspidoceratidae comprise a family of middle and upper

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya. ...

ammonites Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family N ...

that make up part of the superfamily

Perisphinctoidea Perisphinctoidea, formerly Perisphinctaceae, is a superfamily of Middle Jurassic (Bajocian) to Lower Cretaceous (Barremian) Ammonitina, ammonites, commonly with evolute shells with strong ribbing that typically divides about mid flank before cro ...

, characterized by evolute shells, commonly stocky, that tend to develop tubercles. The Aspidoceratidae are thought to be derived from the Perisphinctidae and have been subdivided into three subfamilies, the Aspidoceratinae, Peltoceratinae, and Simoceratinae.

Subfamilies and genera

The Paleobiology Database
/ref> * Aspidoceratinae Zittel 1895 ** '' Aspidoceras'' ** '' Chinamecaceras'' Cantu-Chapa 2006 ** '' Epaspidoceras'' ** '' Euaspidoceras'' ** ''

Orthaspidoceras ''Orthaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae. These nektonic carnivores lived during the Jurassic period, Kimmeridgian age.Sepkoski, JacSepkoski's Online Genus Database – Cephalopoda De ...

'' * Peltoceratinae Spath 1924 ** '' Peltoceras'' ** '' Peltoceratoides'' ** '' Rursiceras'' * Simoceratinae ** '' Simoceras'' ** '' Virgatosimoceras''

References

* Arkell, et al., Mesozoic Ammonoidea.

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 L (Ammonoidea). Geol Soc of America and Univ Kansas Press. Jurassic ammonites Perisphinctoidea Ammonitida families {{Ammonite-stub