Crioceratites

Crioceratites is an ammonite genus from the Early Cretaceous belonging to the Ancyloceratoidea.

Crioceratites was formerly included in the Ancyloceratidae, in the subfamily Crioceratinae which was subsequently elevated in rank to the family Crioceratidae.

Crioceras and Toxoceras d'Orbigny and possibly Emericiceras Sarka 1954 are junior synonyms.

Species within the genus Crioceratites include:[2][3] Crioceratites is coiled in an open, normally equiangular spiral with an oval or subquadrate whorl section.

Crioceratites fossils have been found in Lower Cretaceous Valanginian-Barremanian, sediments in Europe, Africa, Asia, North America and South America; Argentina, Chile and Colombia (Paja Formation).

A rare heteromorph ammonite fossil from the south of France. The species is Crioceratites nolani and the spines have been partially restored to show how it might have appeared in life
Crioceratites duvalii , on display at Galerie de paléontologie et d'anatomie comparée in Paris