Tofangoceras
Tofangoceras Temporal range: middle Ordovician
| |
---|---|
Scientific classification | |
Kingdom: | |
Phylum: | Mollusca
|
Class: | |
Order: | |
Family: | |
Genus: | Tofangoceras Kobayashi, 1927
|
Tofangoceras is a genus of pseudorthoceroid cephalopods from the Middle Ordovician of the USA (NY) and Asia (S. Manchuria, Korea, and Siberia) belonging to the Stereoplasmoceratidae and similar to .
The shell of Tofangoceras is long, straight, and faintly annulated, less strongly than for Stereoplasmoceras. The siphuncle is central with moderately expanded, spindle-like segments. Aperture unknown.
References[]
- Walter C. Sweet, 1964. Nautiloidea - Orthocerida; Treatise on Invertebrate Paleontology, Part K mollusca 3. Geological Society of America and University of Kansas Press.
Categories:
- Prehistoric nautiloid genera
- Ordovician cephalopods of North America
- Ordovician cephalopods of Asia
- Prehistoric nautiloid stubs