| Gaspocyrtoceras Temporal range: Middle Silurian | |
|---|---|
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Subclass: | |
| Order: | |
| Superfamily: | |
| Family: | |
| Genus: | Gaspocyrtoceras Foerste, 1936 |
Gaspocyrtoceras is a genus of orthocerids included in the Paraphragmitidae. Its fossils are limited to North America and have been found in Wisconsin and Quebec.
The shell of Gaspocyrtoceras is a coarsely annularted exogastric cyrtocone. Curvature is upward, the ventral side convex in profile. Annulations slope dorso-ventally to the rear as they do in Calocyrtoceras. Striations on the surface, fine goove-like features, are longitudinal in contrast to the transverse striations of Cyrtocycloceras.
References
- Walter c. Sweet, 1964. Nautiloidea- Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geologica Society of America.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.