Acanthonautilus

Acanthonautilus is an extinct genus in the nautilid family Solenochildae (Aipocerataceae) from the Upper Mississippian of North America and equivalent (uL Carb) strata in Europe, first described by Foord in 1896. Acanthonautilus may have been derived from Aipoceras, or possibly Asymptoceras and give rise, principally through modification of the siphuncle, to Solenochilus.

Acanthonautilus

Acanthonautilus is an extinct genus in the nautilid family Solenochildae (Aipocerataceae) from the Upper Mississippian of North America and equivalent (uL Carb) strata in Europe, first described by Foord in 1896. Acanthonautilus may have been derived from Aipoceras, or possibly Asymptoceras and give rise, principally through modification of the siphuncle, to Solenochilus.