Mosasaurus missouriensis Harlan 1834

Reptilia - Squamata - Mosasauridae

Alternative combinations: Ichthyosaurus missouriensis, Mosasaurus missuriensis

Synonyms: Mosasaurus horridus Williston 1895, Mosasaurus neovidii von Meyer 1845

Full reference: R. Harlan. 1834. Notice of the discovery of the remains of the Ichthyosaurus in Missouri, N. A. Transactions of the American Philosophical Society 4:405-407

Belongs to Mosasaurus according to T. Konishi et al. 2014

See also Caldwell and Bell 2005, Cope 1869, Fanti et al. 2014, Harlan 1834, Hay 1902, Leidy 1857 and Thurmond 1969

Sister taxa: Mosasaurus beaugei, Mosasaurus caroliniensis, Mosasaurus conodon, Mosasaurus couperi, Mosasaurus dekayi, Mosasaurus gracilis, Mosasaurus grosjeani, Mosasaurus hobetsuensis, Mosasaurus hoffmanni, Mosasaurus iembeensis, Mosasaurus impar, Mosasaurus lemonnieri, Mosasaurus lonzeensis, Mosasaurus mangahouangae, Mosasaurus maximilliani, Mosasaurus minor, Mosasaurus mokoroa, Macrosaurus validus, Nectoportheus validus

Type specimens:

  • Mosasaurus missouriensis: MNHN 9587; RFWUIP 1327, a partial skull (rostrum)
  • Mosasaurus horridus: KU 1034. Its type locality is Cheyenne River in Custer County, which is in a Campanian marine shale in the Pierre Shale Formation of South Dakota.
  • Mosasaurus neovidii:


• Cretaceous of Canada (1: Alberta collection), United States (5: Montana, South Dakota, Texas)

Total: 6 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.

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