Kingdom Animalia Scientific name Acanthoceratidae Higher classification Acanthocerataceae Order Ammonitida | Superfamily †Acanthoceratoidea Phylum Mollusca Rank Family Subclass Ammonites | |
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Similar Ammonites, Acanthoceratoidea, Acanthoceras, Calycoceras, Collignoniceratidae | ||
Acanthoceratidae is an extinct family of acanthoceratoid cephalopods in the order Ammonitida, known from the Upper Cretaceous. The type genus is Acanthoceras.
Contents
Diagnosis
Acanthoceratidae species are strongly tuberculate with at least umbilical and ventrolateral tubercles in most genera included. Ribs are dominant in some, in others weak or absent on the outer whorls. Most are evolute, compressed to very depressed in section. Sutures are ammonitic with little variation, but showing a tendency for simplication in later genera.
Taxonomy
Acanthoceratidae de Grossouvre 1894 includes the following subfamilies.
References
Acanthoceratidae Wikipedia(Text) CC BY-SA