The genus Acanthoteuthis was founded by R. Wagner and G. Munster for belemnoids, found in the Solnhofen limestone of Bavaria, which have small hooklets on their arms, sometimes associated with more or less complete remains of the animal [REF].
Munster characterized three species, A. speciosa, A. ferussacii, and A. lichtensteinii, chiefly upon the forms of these hooklets.