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Ivanantonia

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Ivanantonia
Temporal range: early Eocene
Scientific classification
Kingdom:
Phylum:
Class:
Order:
Family:
Ivanantoniidae

Shevyreva, 1989
Genus:
Ivanantonia

Shevyreva, 1989
Species:
I. efremovi
Binomial name
Ivanantonia efremovi
Shevyreva, 1989

Ivanantonia is the only genus in the extinct rodent family Ivanantoniidae and is represented by a single species, Ivanantonia efremovi, from the early Eocene of Mongolia. Ivanantonia is poorly known, with only the lower dentition represented. The genus is unusual among early rodents in lacking all lower premolars and in showing evidence of propalinal chewing (Hartenberger et al., 1997). The relationships of Ivanantonia are unclear. It was described as a ctenodactyloid (Shevyreva, 1989). Hartenberger et al. (1997) suggested a potential relationship to the muroid Nonomys but declined to assign Ivanantoniidae to a suborder within Rodentia.

References

  • Hartenberger, Jean-Louis; Dashzeveg, Demberelyin; Martin, Thomas (1997). "What is Ivanantonia efremovi (Rodentia, Mammalia)?". Paläontologische Zeitschrift. 71 (1–2): 135–143. doi:10.1007/bf03022555. S2CID 83663943.
  • Shevyreva, N.S. 2007. 1989. New rodents (Ctenodactyloidea, Rodentia, Mammalia) from the Lower Eocene of Mongolia. Paleontological Journal, 3: 60–72.