Allocotoceras Explained
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.
Septal necks, according to Teichert, 1964, are holochoanitic, 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.
Further reading
- 10.26749/rstpp.107.207. Ordovician stratigraphy of the Florentine Synclinorium, southwest Tasmania . 1973 . Corbett . K. D. . Banks . M. R. . Papers and Proceedings of the Royal Society of Tasmania . 107 . 207–238 . 126628381 . free .
- Teichert, C. 1964. Endoceratoidea. Treatise on Invertebrate Paleontology, Part K. Endoceratoidea, Actinoceratoidea, Nautiloidea. Geological Soc. of America and Univ. Kansas Press
External links
Notes and References
- http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=12705 Allocotoceras
