''Gaspocyrtoceras'' is a genus of

orthocerid Orthocerida is an order of extinct Orthoceratoid cephalopods also known as the Michelinocerida that lived from the Early Ordovician () possibly to the Late Triassic (). A fossil found in the Caucasus suggests they may even have survived until ...

s included in the

Paraphragmitidae Paraphragmitidae is an extinct family of actively mobile aquatic carnivorous cephalopods belonging to the subclass Orthoceratoidea endemic to what would be Asia and Europe during the Silurian living from 436 to 418.7 mya, existing for approxima ...

. 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. Prehistoric nautiloid genera Silurian animals {{paleo-nautiloidea-stub