Megadisocosorus

Megadisocosorus
Temporal range: Middle Silurian
Scientific classification
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Actinocerida
Family: Armenoceratidae
Genus: Megadisocosorus
Foeste, 1925.

Megadisocosorus is an actinocerid cephalopod similar to Armenoceras but with a short, slightly curved, breviconic shell. The siphuncle is in contact with the ventral wall, unlike that of Armenoceras in which the siphuncle is close to the center.

Megadisocosorus is known from the Middle Silurian of North America. According to Teichert, 1964, Megadisocosorus is a member of one of the two branches of the Armenoceratidae that also includes Nybyoceras and Selkirkoceras.

References


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