ammonites
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Yokoyamaoceras Wright and Matsumoto 1954 (ammonite)

Cephalopoda - Ammonitida - Kossmaticeratidae

PaleoDB taxon number: 82576

Alternative spelling: Yokoyamoceras

Parent taxon: Kossmaticeratinae according to W. J. Kennedy and H. Summesberger 1999

Sister taxa: Brahmaites, Grossouvrites, Gunnarites, Jacobites, Kossmaticeras, Maorites, Neograhamites, Pseudokossmaticeras

Subtaxa: Yokoyamoceras jimboi

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Ecology: fast-moving nektonic carnivore