†Oneotoceras extremum Ulrich et al. 1943 (mollusk)
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Cephalopoda - Ellesmerocerida - Ellesmeroceratidae
Full reference: E. O. Ulrich, A. F. Foerste, and A.K. Miller. 1943. Ozarkian and Canadian cephalopods. Part II, Brevicones. Geological Society of America Special Papers 49:1-240
Belongs to Oneotoceras according to E. O. Ulrich et al. 1943
Sister taxa: Oneotoceras curvatum, Oneotoceras divaricatum, Oneotoceras husseyi, Oneotoceras impressum, Oneotoceras loculosum, Oneotoceras madisonense, Oneotoceras magnum, Oneotoceras percurvatum, Oneotoceras wisconsinense
Ecology: nektobenthic carnivore
Distribution: found only at Wilson's quarry near Madison (Ordovician of Wisconsin)
Specimen images are retrieved through the ePANDDA API.
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