Allocotoceras
Allocotoceras is an endocerid from the Lower Ordovician (upper Canadian) Karmberg Formation of Australia (Tasmania),[1] included in the Endoceratidae, based on small, straight or gently curved siphuncles.
| Allocotoceras Temporal range: Darriwilian ~ | |
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| Genus: | Allocotoceras Teichert & Glenister 1953 |
Septal necks, according to Teichert, 1964, are holochoantic, reaching to the previous septum. Endocones are described as having a dorsal wedge, or process, making the internal opening, or endosiphocone, semicircular in cross section. In this sense Allocotoceras seems to resemble the genus Najaceras.
References
- Allocotoceras at Fossilworks.org
Further reading
- K. D. Corbett and M. R. Banks. 1974. Ordovician stratigraphy of the Florentine Synclinorium, southwest Tasmania. Papers and Proceedings of the Royal Society of Tasmania 107:207-238
- Teichert, C. 1964. Endoceratoidea. Treatise on Invertebrate Paleontology, Part K. Endoceratoidea, Actinoceratoidea, Nautiloidea. Geological Soc. of America and Univ. Kansas Press
External links
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