Cephalopoda - Protactinocerida

Parent taxon: Actinoceridea according to R. E. Crick 1981

See also Sepkoski 2002

Sister taxa: none

Subtaxa: Benxioceras Mastoceras Protactinoceratidae

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Ecology: fast-moving nektobenthic carnivore

Distribution: found only at Wan-wan-kou dolomite at Wan-wan-kou valley in the Niuhsintai basin ( of South Korea)

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