| Involuticeras Temporal range: U Jurassic |
|
|---|---|
| Scientific classification | |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Superfamily: | Perisphinctaceae |
| Family: | Perisphinctidae |
| Genus: | Involuticeras Quenstedt, 1846 |
Involuticeras: a perisphinctacean ammonite belonging to the Aulacostephanininae from the Upper Jurassic of Europe and possibly Mexico. Shell involute, moderately compressed,venter rounded, ribbed. Similar in general form to Aulacostephanus and Epicephalites
Treatise on Invertebrate Paleontology, Part L,(1957), Mesozoic Ammonoidea, p. L324.