Astiericeras
From Wikipedia, the free encyclopedia
| Astiericeras Temporal range: | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Suborder: | †Ancyloceratina |
| Family: | †Douvilleiceratidae |
| Subfamily: | †Douvilleiceratinae |
| Genus: | †Astiericeras Parona & Bonarelli. 1896 |
Astiericeras is an ammonite from the Lower Cretaceous, the shell of which is evolute, stout; outer whorl with strong, well spaced, transverse ribs that cross smoothly over the broad venter; early whorls with lateral tubercles. The outer, mature whorl separates from the coil but hooks back quickly, referred to as a heteromorph.
Astiericeras is generally considered to be a douvillieceratid.[2] However, according to W. J. Kennedy, the genus may instead be a scaphitoid.[3]
