Liroceras
| Liroceras Temporal range: Mississippian (L Carb) - Permian | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Nautilida |
| Superfamily: | Clydonautilaceae |
| Family: | Liroceratidae |
| Genus: | Liroceras Teichert, 1940 |
Liroceras is the type genus of the clydonautiliacean family, Liroceratidae, and is characterized by a rapidly expanding, subglobular, nautiliconic shell with a reniform whorl section, small umbilicus, essentially straight sutures, and a siphuncle with a variable but not marginal position.
Liroceras has a range from the Mississippian to the Permian, longest of the Liroceratidae. It has been found the North America, Europe, China and the East Indies. Condraoceras differs in having a circular cross section and shallow ventral and lateral lobes. Bistrialites also has a reniform whorl section but differs in having a large funnel-shaped umbilicus.
References
- Bernhard Kummel, 1964. Nautiloidea-Nautilida; Treatise on Invertebrate Paleontology, Part K. Geol Soc of America and Univ of Kansas Press, R. C. Moore (ed) — Liroceratidae K444–K447.