Bitaunioceras

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Bitaunioceras
Temporal range: Permian
Scientific classification
Kingdom:
Phylum:
Mollusca
Class:
Subclass:
Nautiloidea
Order:
Superfamily:
Family:
Subfamily:
Michelinoceratinae
Genus:
Bitaunioceras

Shimizy & Obata, 1936

Bitaunioceras is a genus of Permian orthocerids with a gradually expanding, straight, orthodontic shell with straight transverse sutures and a small, subcentral siphuncle with straight tubular orthochromatic necks.

The shell surface of Bitaunioceras has a few, shallow, rounded constrictions and numerous, unequal, prominent transverse wire-like lirae.

Bitaunioceras species have been found in Texas in the United States, Coahuila in Mexico, Sicily, Timor, and the south Urals in Russia.

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