Gryponautilus
| Gryponautilus Temporal range: Late Triassic | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Nautilida |
| Superfamily: | Trigonocerataceae |
| Family: | Grypoceratidae |
| Genus: | Gryponautilus Mojsisovics, 1902 |
Gryponautilus is an Upper Triassic nautilid (generally coiled nautiloid cephalopods) belonging to the trigonoceratacean family Grypoceratidae, characterized by involute, inflated shells, which at maturity develop narrowly rounded keel-like venters. Venters on inner whorls are truncated and broadly convex to concave.
Immature forms bear a resemblance to Grypoceras.
References
- R.C. Moore, ed. (1964). Part K, Mollusca 3. Treatise on Invertebrate Paleontology. Lawrence, Kansas: Geological Society of America and University of Kansas Press. p. K190–K216.
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