Rank Genus | Phylum Mollusca Subclass Nautiloidea | |
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 transvere striations of Cyrtocycloceras.
References
Gaspocyrtoceras Wikipedia(Text) CC BY-SA