Ogmodirus

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Ogmodirus
Temporal range: Late Cretaceous, 94.3–89.3  Ma
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Ogdomirus holotype.jpg
Paddle bone of KUVP 441
Ogmodirus cervicals.png
Cervical series of KUVP 441
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Sauropsida
Order:
† Plesiosauria
Suborder:
† Plesiosauroidea
Family:
† Elasmosauridae?
Genus:
†Ogmodirus

Williston and Moodie, 1913
Binomial name
†Ogmodirus martini
Williston & Moodie, 1913
Synonyms
  • Ogmodirus martiniiMoodie, 1916

Ogmodirus is an extinct genus of plesiosaur found in the Cenomanian-Turonian (Late Cretaceous) Greenhorn Limestone of Kansas. [1] [2] The type species, O. martini, was named by Samuel Wendell Williston and Roy Lee Moodie in 1913. [2]

Contents

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. [2] KUVP 441 was named as Ogmodirus martini by Williston & Moodie (1913) [2] and the specific name was emended to martinii by Moodie (1916), but the original name takes precedence. [3] The holotype was described in detail by Williston & Moodie (1917). [3]

A second species, Ogmodirus ischiadicus (based on specimen KUVP 434), was initially placed within its own genus, Thalassiosaurus, [3] and has since been referred to Styxosaurus . [4] It was placed in Ogmodirus by Williston & Moodie (1917). [3]

Classification

According to Welles (1962), [5] 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. [6]

See also

References

  1. ↑ Ogmodirus martini from Oceans of Kansas
  2. 1 2 3 4 Williston, S. W. and Moodie, R. L. (1913). New plesiosaurian genus from the Cretaceous of Nebraska. Bulletin of the Geological Society of America24: 120-121.
  3. 1 2 3 4 S. W. Williston and R. L. Moodie. (1917). Ogmodirus martinii, a new plesiosaur from the Cretaceous of Wyoming. The University of Kansas Science Bulletin 10(2):61-73
  4. ↑ S. W. Williston. (1903). North American plesiosaurs, part 1. Geological Series Field Museum of Natural History 3(1):1-77
  5. ↑ 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
  6. ↑ Sepkoski, J.J. (2002). A compendium of fossil marine animal genera. Bulletins of American Paleontology363:1-560.
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