Gaspocyrtoceras

Gaspocyrtoceras
Temporal range: Middle Silurian
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: †Orthocerida
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


This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.