Aulacostephanidae

Aulacostephanidae Temporal range: Jurassic (Kimmeridgian), 155.7–150.8 Ma PreЄ Є O S D C P T J K Pg N ↓

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

Aulacostephanus
Rasenia

References

JOHN K. WRIGHT The Aulacostephanidae (Ammonoidea) of the Oxfordian/Kimmeridgian boundary beds (Upper Jurassic) of southern England
Ammonites

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