Augustoceras
| Augustoceras Temporal range: Mid to Late Ordovician
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| Phylum: | Mollusca
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| Genus: | Augustoceras Flower, 1944
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Augustoceras is a genus of nautiloid cephalopods included in the order Oncocerida and family Valcouroceratidae. It is known form the Middle and Upper Ordovician of Kentucky and Ohio in the US.
Shells of Augustocers are slender, upwardly curved, fusiform, exogastric cyrtocones with subtriangular cross-sections, short chambers, oblique sutures, and subventral siphuncles with simple internal radial actinosiphonate deposits. Kindleoceras from the Upper Ordovician of Ontario differs in having a more triangular cross-section and more numerous actinosiphonate rays in its siphuncle.
References[]
- Walter C Sweet, 1964 Nautiloidea-Oncocerida. Treatise on Invertebrate Paleontology Part K Mollusca 3. Geological Society of America and University of Kansas Press
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Categories:
- Prehistoric nautiloid genera
- Middle Ordovician first appearances
- Late Ordovician extinctions
- Fossils of Georgia (U.S. state)
- Prehistoric nautiloid stubs