- Octamerella
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Octamerella
Temporal range: M SilurianScientific classification Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Subclass: Nautiloidea Order: Oncocerida Family: Hemiphragmoceratidae Genus: Octamerella
Teichert and Sweet (1962)Octamerella is an extinct prehistoric nautiloidgenus from the oncocerid family Hemiphragmoceratidae that lived in what is now Europe and North America during the Middle Silurian.
Octamerella has a breviconic shell and a mature aperture that is contracted so as to have four pairs of dorsolateral sinusus, four on each side, and a narrow mid dorsal salient. The two ventral-most sinus pairs are typically the larges while the dorsal-most pair is short and wide, forming a circular opening. (Sweet, 1964)
References
- Sweet, W.C. 1964.Nautilodea-Oncocerida; Treatise on Invertebrate Paleontology, Part K; Geol Soc of America and Univ Kansas Press, Teichert & Moore eds.
- Sepkoski, J.J. Jr. 2002. A compendium of fossil marine animal genera. D.J. Jablonski & M.L. Foote (eds.). Bulletins of American Paleontology 363: 1–560. Sepkoski's Online Genus Database (CEPHALOPODA)
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See also
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