Savageoceras
Appearance
Savageoceras Temporal range: M Silurian
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Cephalopoda |
Subclass: | Nautiloidea |
Order: | †Tarphycerida |
Family: | †Barrandeoceratidae |
Genus: | †Savageoceras Foeste, 1932 |
The genus Savageoceras is a barrandeoceratid first known from the Middle Silurian of Illinois consisting of rapidly enlarging, depressed cyrtocones with a trapezoidal section; ventral side wider and flatter than dorsal; sides converging on dorsum. Sutures have slight lateral and ventral lobes and ventrolateral saddles. The surface is covered by transverse striae and has rib-like rings that are more prominent at the ventrolateral shoulders but otherwise vaguely defined. The siphuncle is central; interior unknown.
References
[edit]- Sweet, W.C. Nautiloidea - Barrandeocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc. of America and Univ. of Kansas press.