ammonites
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†family Gaudryceratidae Spath 1927 (ammonite)

Cephalopoda - Ammonitida

Alternative spelling: Gaudryceratinae

Synonym: Gaudryceras sigcau van Hoepen 1921 [nomen dubium]

Parent taxon: Tetragonitoidea according to W. J. Kennedy et al. 2007

Sister taxon: Tetragonitidae

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

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Ecology: fast-moving nektonic carnivore