ammonites
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†family Gaudryceratidae Spath 1927 (ammonite)

Cephalopoda - Ammonoidea

Alternative spelling: Gaudryceratinae

Parent taxon: Tetragonitaceae according to W. J. Kennedy 1994

Sister taxon: Tetragonitidae

Subtaxa: Anagaudryceras, Eogaudryceras, Gaudryceras, Kossmatella, Vertebrites, Zelandites

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Ecology: fast-moving nektonic carnivore