Cephalopoda - Tarphycerida - Estonioceratidae

PaleoDB taxon number: 13350

Full reference: A. Hyatt. 1894. Phylogeny of an acquired characteristic. Proceedings of the American Philosophical Society 32(143):349-647

Parent taxon: Estonioceratidae according to D.H. Evans 2011

Sister taxa: Aethoceras, Alaskoceras, Clytoceras, Deltoceras, Eichwaldoceras, Estonioceras, Pycnoceras, Shumardoceras, Tragoceras

Subtaxa: Aphetoceras americanum, Aphetoceras attenuatum, Aphetoceras boreale, Aphetoceras evolutum, Aphetoceras farnsworthi, Aphetoceras oderi, Aphetoceras ruedemanni, Aphetoceras subcostulatum

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Type: Aphetoceras americanum

Ecology: fast-moving nektobenthic carnivore