Gaspocyrtoceras
| Gaspocyrtoceras Temporal range: Middle Silurian | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Orthocerida |
| Superfamily: | Orthocerataceae |
| Family: | Paraphragmitidae |
| Genus: | Gaspocyrtoceras Foerste 1936 |
Gaspocyrtoceras is an orthocerid genus 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 transvere striations of Cyrtocycloceras.
References
- Walter c. Sweet, 1964. Nautiloidea- Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geologica Society of America.
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