Acanthoscaphites

Acanthoscaphites is an extinct genus of cephalopod belonging to the Ammonite subclass. The average diameter of its shell was approximately 3/4 in, but some specimens have been found with a diameter of slightly over 2 in.

Classification
Acanthoscaphites was first described by Schluter in 1872. Subsequent taxonomic revisions indicate that the relationship between Acanthoscaphites and Trachyscaphites is still unclear: Acanthoscaphites may have evolved in parallel with or as a derivative of Trachyscaphites.

Species


 * A. plenus
 * A. tridens
 * A. verneuilianus

Biogeography
Acanthoscaphites was a widespread genus during Campanian and Maastrichtian times, approximately 80 million years ago. Its remains can be found in rocks of that age from Europe and North America.