Parryoceras
| Parryoceras Temporal range: Middle and Late Ordovician | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Discosorida |
| Family: | Cyrtogomphoceratidae |
| Genus: | Parryoceras Sweet and Miller, 1957 |
Parryoceras is a cyrtogomphoceratid similar to Strandoceras but with broadly expanded siphuncle segments and a nearly straight ventral line. The mature shell is thickened on the inside just behind the aperture resulting in a constriction in the internal mold at the adoral end.
Parryoceras comes from the middle and upper Ordovician of arctic Canada and Norway.
References
- Flower, Rousseau H. and Curt Teichert, 1957; The Cephalopod Order Discosorida, in University of Kansas Paleontological Contributions, Mollusca Article 6, pp 1-144 (plates, figs) July1, 1957.
- Curt Teichert 1964. Nautiloidea-Discosorida; Treatise on Invertebrate Paleontology Part K, Endoceratoidea, Actinoceratoidea, Nautiloidea. Geological Society of America.