Crioceratites

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Crioceratites
Temporal range: Valanginian–Barremian[1]
Crioceratites sp.jpg
Crioceratites species
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Ancylocerataceae
Family: Crioceratitidae
Genus: Crioceratites
Léveillé 1837
Synonyms
  • Crioceras d'Orbigny, 1842
  • Crioceratites (Crioceras) d'Orbigny, 1842
  • Toxoceras d'Orbigny, 1842

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

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[edit]

Species within the genus Crioceratites include:[2]

  • C. andersoni
  • C. barrabei
  • C. bituberculatus
  • C. coniferus
  • C. duvalii
  • C. elegans
  • C. heterocostatus
  • C. krenkeli
  • C. latus
  • C. loryi
  • C. panescorsii
  • C. portarum
  • C. tehamaensis
  • C. yollabollium

Description[edit]

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

Crioceritites 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[edit]

Crioceratities fossils have been found in Lower Cretaceous Hauterevian-Barremanian, sediments in Europe, Africa, Asia, North America and South America.

References[edit]

Notes
  1. ^ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28. 
  2. ^ "Paleobiology Database - Crioceratites". Retrieved 2014-05-28. 
Bibliography
  • Simon & Schuster's Guide To Fossils (Nature Guide Series) by Paolo Arduini
  • Treatise on Invertebrate Paleontology, Part L, Ammonoidea,--Ancyloceratiaceae; Geological Society of America 1957, reprinted 1990.