Shelbyoceras (original) (raw)
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Extinct genus of molluscs
| Shelbyoceras | |
|---|---|
Scientific classification  |
|
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Monoplacophora |
| Order: | †Archinacelloidea |
| Family: | †Shelbyoceridae |
| Genus: | †_Shelbyoceras_Ulrich & Foerste, 1931 |
| Type species | |
| _Shelbyoceras robustum_Ulrich & Foerste, 1936 | |
| Species | |
| S. bigpineyensis Stinchcomb, 1986[1] S. buttsi Ulrich et al., 1943_S. robustum_ Ulrich & Foerste, 1936_S. unguliforme_ Ulrich et al., 1943 |
Shelbyoceras is a genus of Cambrian monoplacophora which was one of the genera mistaken for a cephalopod, since the characteristics differentiating monoplacophora from cephalopods are few. Shelbyoceras was reclassified based on a depressed groove that forms a band around the shell, which is similar to a feature seen in Hypseloconus[2] (with whom it may be synonymous).[3] The septa in this genus are either closely or irregularly spaced.[2]
- ^ Stinchcomb, B. L. (1986). "New Monoplacophora (Mollusca) from Late Cambrian and Early Ordovician of Missouri". Journal of Paleontology. 60 (3): 606–626. doi:10.1017/s0022336000022149.
- ^ a b Stinchcomb, B. L. (1980). "New Information on Late Cambrian Monoplacophora Hypseloconus and Shelbyoceras (Mollusca)". Journal of Paleontology. 54 (1). Paleontological Society: 45–49. doi:10.2307/1304159. JSTOR 1304159.
- ^ Stinchcomb, B. L.; Echols, D. J. (1966). "Missouri Upper Cambrian Monoplacophora Previously Considered Cephalopods". Journal of Paleontology. 40 (3): 647–650. doi:10.2307/1301748. JSTOR 1301748.