Rank Family | ||
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Similar Aspidoceratidae, Aulacostephanus, Rasenia, Aspidoceras, Ataxioceratidae | ||
Aulacostephanidae is an extinct ammonoid cephalopod family belonging to the superfamily Perisphinctoidea. These fast-moving nektonic carnivores lived during the Upper Jurassic period, in the Kimmeridgian age.
Genera
References
Aulacostephanidae Wikipedia(Text) CC BY-SA