Cephalopoda - Orthocerida - Geisonoceratidae

Full reference: R. C. Frey. 1995. Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati Arch region of Kentucky, Indiana, and Ohio. U.S. Geological Survey Professional Paper 1066P:1-126

Parent taxon: Geisonoceratidae according to R. C. Frey 1995

Sister taxa: Angeisonoceras, Columenoceras, Geisonoceras, Harrisoceras, Joachimoceras, Jonesoceras, Protokionoceras, Striacoceras, Temperoceras, Ugooloceras, Virgoceras, Zhuravlevia

Subtaxa: Ordogeisonoceras amplicameratum

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Ecology: nektonic carnivore