Biology: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 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.

Wikidata ☰ Q22285180 entry