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Ogmodirus

Extinct genus of reptiles


Summary

Extinct genus of reptiles

Ogmodirus is an extinct genus of plesiosaur found in the Cenomanian-Turonian (Late Cretaceous) Greenhorn Limestone of Kansas.

Discovery and naming

The holotype, KUVP 441, consists of a pelvic girdle, limb elements, and more than fifty cervical (neck) vertebrae from a juvenile discovered in Cloud County, Kansas by C. Boyce in 1909.

A second species, Ogmodirus ischiadicus (based on specimen KUVP 434), was initially placed within its own genus, Thalassiosaurus, It was placed in Ogmodirus by Williston & Moodie (1917).

Classification

According to Welles (1962), Ogmodirus martini may be member of the Elasmosauridae, a group of marine animals related to Elasmosaurus, but the condition of the fossils discovered to date means the genus is dubious beyond Plesiosauria. Sepkoski (2002) assigned Ogmodirus to the Plesiosauria.

References

References

  1. [http://www.oceansofkansas.com/Will-Moodie13.html ''Ogmodirus martini''] from Oceans of Kansas
  2. The [[type species]], '''''Ogmodirus martini''''', was named by [[Samuel Wendell Williston]] and [[Roy Lee Moodie]] in 1913.Williston, S. W. and Moodie, R. L. (1913). New plesiosaurian genus from the Cretaceous of Nebraska. ''Bulletin of the Geological Society of America'' '''24''': 120-121.
  3. and has since been referred to ''[[Styxosaurus]]''. S. W. Williston. (1903). North American plesiosaurs, part 1. ''Geological Series Field Museum of Natural History'' 3(1):1-77
  4. S. P. Welles. (1962). A new species of elasmosaur from the Aptian of Colombia and a review of the Cretaceous plesiosaurs. ''University of California Publications in Geological Sciences'' 44(1):1-96
  5. Sepkoski, J.J. (2002). A compendium of fossil marine animal genera. ''Bulletins of American Paleontology'' '''363''':1-560.
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