Cummingsoceras is a genus of barrandeoceroids within the Tarphycerida, included in the family Uranoceratidae. Its shell is a rapidly expanding gyrocone of about 1.5 narrowly separated whorls.
| Cumingsoceras Temporal range: Middle Silurian
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | †Tarphycerida |
| Family: | †Uranoceratidae |
| Genus: | †Cumingsoceras Flower, 1950 |
The surface is faintly cancellated by slight longitudinal lines that cross growth lines which define a deep hyponomic sinus. The siphuncle is small, subcentral, and with recumbent necks.
Cummingsoceras is known from the middle Silurian of Indiana and Illinois.
References edit
- Sweet, Walter C. 1964. Nautiloidea-Barrandeocerida. Treatise on Invertebrate Paleontology, Part K. Geol Soc of America and Univ Kansas Press.
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