Tofangoceras
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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 Stereoplansmoceras.
Quick Facts Tofangoceras Temporal range: middle Ordovician, Scientific classification ...
Tofangoceras Temporal range: middle Ordovician | |
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Genus: | Tofangoceras Kobayashi, 1927 |
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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.