Ammonoceratites
Ammonoceratites is an extinct genus of ammonoid cephalopod known from the Albian (upper Lower Cretaceous) of British Columbia, Madagascar, New Zealand, and Japan, included in the Lytoceratidae.
| Ammonoceratites Temporal range: | |
|---|---|
 | |
| Ammonoceratites ezoense | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Lytoceratidae |
| Subfamily: | †Lytoceratinae |
| Genus: | †Ammonoceratites Bowditch 1822 |
| Species[2] | |
| |
The shell of Ammonoceratites is evolute, smooth, moderately expanded; the inner rim (dorsum) only slightly impressed; whorl section subcircular. It is similar to that of Lytoceras which has transverse ribbing and to that of Pictetia which is gyroconic (whorls not touching) and more strongly expanded.
References
- Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
- Paleobiology Database - Ammonoceratites. 2014-05-29.
- Arkell et al., 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L; Geological Society of America and University of Kansas press.
- C. W. Wright, J. H. Calloman, and M. K. Howarth. 1996. Cretaceous Ammonoidea. Treatise on Invertebrate Paleontology revised L(4):1-362
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