Cephalopoda - Ellesmerocerida - Ellesmeroceratidae

Parent taxon: Ellesmeroceratidae according to B. Kröger and E. Landing 2007

Sister taxa: Albertoceras, Annoceras, Barnesoceras, Boreoceras, Bridgeoceras, Buehleroceras, Burenoceras, Caseoceras, Chepuloceras, Clarkoceras, Clelandoceras, Conocerina, Cumberloceras, Dakeoceras, Ectenoceras, Ectenolites, Ellesmeroceras, Eorudolfoceras, Eremoceras, Hemichoanella, Lebetoceras, Levisoceras, Llanoceras, Loxochoanella, Muriceras, Oelandoceras, Oneotoceras, Pachendoceras, Quebecoceras, Robsonoceras, Ruthenoceras, Shantungendoceras, Smithvilloceras, Stemtonoceras, Ventroloboceras, Woosteroceras

Subtaxa: Walcottoceras monsense, Walcottoceras obliquum

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Type: Endoceras monsensis

Ecology: nektobenthic carnivore