Crioceratites
Temporal range: Valanginian–Barremian[1]
Crioceratites species
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Suborder: †Ancyloceratina
Family: †Crioceratitidae
Genus: †Crioceratites
Léveillé, 1837
Synonyms
  • Crioceras d'Orbigny, 1842
  • Crioceratites (Crioceras) d'Orbigny, 1842
  • Toxoceras d'Orbigny, 1842
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 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

Species within the genus Crioceratites include:[2][3]

Description

Crioceratites duvalii, on display at Galerie de paléontologie et d'anatomie comparée in Paris

Crioceratites is coiled in an open, normally equiangular spiral with an oval or subquadrate whorl section. The surface is banded by fine, dense, rounded ribbing sectioned by periodically spaced thick and often spinose ribs.

Distribution

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).

References

  1. ^ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  2. ^ "Paleobiology Database - Crioceratites". Retrieved 17 December 2021.
  3. ^ Klein, J. et al. FOSSILIUM CATALOGUS I:ANIMALIA Pars 144, Lower Cretaceous Ammonites III Bochianitoidea, Protancyloceratoidea, Ancyloceratoidea, Ptychoceratoidea, 2007.

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