Styrionautilus
| Styrionautilus Temporal range: Middle-Late Triassic (Nor)
| |
|---|---|
| Scientific classification | |
| Kingdom: | |
| Phylum: | Mollusca
|
| Class: | |
| Order: | |
| Family: | |
| Genus: | Styrionautilus Mojsisovics, 1902
|
Styrionautilus is a genus of nautiloids and first of the Clydonautilidae with a range extending from the Middle Triassic, Anisian to the Upper Triassic, Norian. Its fossils found in North America (Nevada), Europe, and Timor.
In general form Styrionautilus is similar to other clydonautilids, smooth and involute. The suture however is more primitive. The ventral saddle is straight across without modification of a median lobe.
Styrionautilus may be derived from or similar form included in the Liroceratidae. In turn Styrionautilus is the likely ancestor of Proclydonautilus, Cosmonautilus, and/or Callaionautilus
References[]
- Bernhard Kummel, 1964. Nautiloidea-Nautilida. Treatise on Invertebrate Paleontology, Part K. Geological Society of America.
- Styrionautilus in Fossilworks gateway.
- J.J. Sepkoski 2002 Online list of cephalopod genera
 | This prehistoric nautiloid-related article is a stub. You can help Wikipedia by . |
Categories:
- Prehistoric nautiloid genera
- Anisian genus first appearances
- Ladinian genera
- Carnian genera
- Norian genus extinctions
- Anisian life
- Prehistoric nautiloid stubs