| Chicagooceras Temporal range: Silurian | |
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| Genus: | Chicagooceras Foerste and Savage 1927 |
Chicagooceras is a genus of orthocerids from the Silurian of North America.
Shells are short, breviconic, and faintly curved. Sutures are fairly wide spaced and though straight, slope slightly, dorso-ventrally, to the rear. Siphuncle: small, slightly ventral of the center, thought to be orthochoanitic (straight septal necks) and cylindrical (tubular connecting rings).
References
- Walter c. Sweet, 1964. Nautiloidea -Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Society of America.
- Chicagooceras in Fossilworks.
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