Aulacostephanidae

Aulacostephanidae
Temporal range: Jurassic (Kimmeridgian), 155.7–150.8Ma
Fossil shell of Rasenia cymodoce from Calvados (France), on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Perisphinctoidea
Family: Aulacostephanidae
Spath 1924

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