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 Mya. The J ...

ammonites Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

that make up part of the superfamily

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

, 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 The Peltoceratinae comprise a subfamily in the Aspidoceratidae, (middle and upper Jurassic perisphinctacean ammonites). Genera in the Peltoceratinae have sharply ribbed inner whorls and outer whorls that bear spines or tubercles, or have coarse ...

, and

Simoceratinae The Simoceratinae is a subfamily in the Aspidoceratidae The Aspidoceratidae comprise a family of middle and upper Jurassic ammonites that make up part of the superfamily Perisphinctoidea, characterized by evolute shells, commonly stocky, tha ...

Subfamilies and genera

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

Epaspidoceras ''Epaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the order Ammonitida, family Aspidoceratidae. These cephalopods were fast-moving nektonic carnivores. They lived during the Jurassic (Kimmeridgian In the geologic timescale ...

'' ** '' Euaspidoceras'' ** ''

Orthaspidoceras ''Orthaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae. These nektonic carnivores lived during the Jurassic period, Kimmeridgian In the geologic timescale, the Kimmeridgian is an age in the Late J ...

'' *

Spath 1924 ** ''

Peltoceras ''Peltoceras'' is an extinct ammonite genus from the aspidoceratid subfamily Peltoceratinae that lived during the later part of the Middle Jurassic (U Callovian In the geologic timescale, the Callovian is an age and stage in the Middle Juras ...

'' ** '' Peltoceratoides'' ** ''

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

'' *

** '' Simoceras'' ** '' Virgatosimoceras''

References

* Arkell, et al., Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol Soc of America and Univ Kansas Press. Jurassic ammonites Perisphinctoidea Ammonitida families {{Ammonite-stub