Chicagooceras
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| Chicagooceras Temporal range: Silurian | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | †Orthocerida |
| 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).
