Reigitherium

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Reigitherium
Temporal range: Late Cretaceous, Campanian–Maastrichtian
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Class: Mammalia
Branch: Meridiolestida
Family: Reigitheriidae
Genus: Reigitherium
Bonaparte, 1990
Species: R. bunodontum
Binomial name
Reigitherium bunodontum
Bonaparte, 1990

Reigitherium bunodontum is a mammal that lived during the Late Cretaceous (Late Campanian-Maastrichtian). Fossils of it have been found in the Los Alamitos and the La Colonia Formations of Argentina.

Reigitherium was initially classified in the order Dryolestida.[1] In 2000 Pascual et al. found it to be a Docodont. Later authors found it to be neither a dryolestoid nor a docodont, and found it to be of uncertain placement within Mammalia.[2][3] In 2011, Rougier et al. found it to be a Dryolestoid again, within Meridiolestida, a clade composed of Gondwanan Dryolestoids.[4] It "differs from other Mesozoic mammals including docodontans in that the lower molars decrease in length and notably increase in width posteriorly."

References[edit]

  1. ^ Bonaparte, J.F. (1990) New Late Cretaceous mammals from the Los Alamitos Formation, northern Patagonia National Geographic Research 6 (1), p.63-93.
  2. ^ Pascual R., Goin F.J., Gonzalez P., Ardolino A. & Puerta P.F. (2000) A highly derived docodont from the Patagonian Late Cretaceous Geodiversitas 22 (3) Documento pdf.
  3. ^ Mikko Haaramo (2007) Mikko's Phylogeny Archive Acceso: 31 de octubre de 2007.
  4. ^ Guillermo W. Rougier, Sebastián Apesteguía and Leandro C. Gaetano (2011). "Highly specialized mammalian skulls from the Late Cretaceous of South America". Nature. 479: 98–102. doi:10.1038/nature10591.  Supplementary information