Olcostephanus Explained

Olcostephanus is an extinct ammonoid cephalopod genus belonging to the family Olcostephanidae. These fast-moving nektonic carnivores lived during the Cretaceous, from the upper Valanginian to the lower Hauterivian age.^{[1] [2]}

Species^[3]

• Olcostephanus astierianus (d'Orbigny, 1840)
• Olcostephanus atherstoni Sharpe, 1856
• Olcostephanus bakeri Imlay, 1937
• Olcostephanus bosei Riedel, 1938
• Olcostephanus delicatecostatus Haas, 1960
• Olcostephanus detonii Rodighiero 1919
• Olcostephanus filifer Imlay, 1937
• Olcostephanus laticosta Gerth, 1925
• Olcostephanus paucicostatus Imlay, 1937
• Olcostephanus pecki Imlay, 1960
• Olcostephanus popenoei Imlay, 1960
• Olcostephanus prorsiradiatus Imlay, 1937
• Olcostephanus quadriradiatus Imlay, 1938
• Olcostephanus sanlazarensis Imlay, 1937

Distribution

Fossils of species within this genus have been found in the Cretaceous sediments of Antarctica, Argentina, Austria, Bulgaria, Chile, Colombia (Macanal Formation, Eastern Ranges),^[4] Czech Republic, France, Hungary, Italy, Mexico, Morocco, Poland, Portugal, Romania, Slovakia, South Africa, Spain, Russia, United States, as well as in the Jurassic of Argentina.^[3]

References

Bibliography

• • Book: [[Claud William Wright|Wright C.W.]] with J.H. Callomon and M.K. Howarth . 1996 . Mollusca 4 Revised: Cretaceous Ammonoidea . 4 . Treatise on Invertebrate Paleontology Part L . Roger L. Kaesler . Boulder, Colorado and Lawrence, Kansas . The Geological Society of America & University of Kansas Press . registration . 46 . Internet Archive.

Notes and References

1. Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopoda
2. https://www.worldcat.org/oclc/61988855 Wright C. W. with J.H. Callomon and M.K. Howarth (1996), Mollusca 4 Revised, Cretaceous Ammonoidea, vol. 4
3. https://www.fossilworks.org The Paleobiology Database
4. Piraquive et al., 2011, p.204