- Ivanantonia
Taxobox
name = "Ivanantonia"
fossil_range = earlyEocene
regnum =Animal ia
phylum =Chordata
classis =Mammal ia
ordo =Rodent ia
familia = †Ivanantoniidae
familia_authority = Shevyreva, 1989
genus = †"Ivanantonia"
genus_authority = Shevyreva, 1989
species = †"I. efremovi"
binomial = †"Ivanantonia efremovi"
binomial_authority = Shevyreva, 1989"Ivanantonia" is the only
genus in the extinctrodent family Ivanantoniidae and is represented by a single species, "Ivanantonia efremovi", from the early Eocene of Mongolia. "Ivanantonia" is poorly known, with only the lowerdentition represented. The genus is unusual among early rodents in lacking all lowerpremolar s 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 withinRodent ia.References
*Hartenberger, J.-L., D. Dashzeveg, and T. Martin. 1997. What is "Ivanantonia efremovi" (Rodentia, Mammalia)? Paläontologische Zeitschrift, 71(1/2): 135-143.
*Shevyreva, N.S. 2007. 1989. New rodents (Ctenodactyloidea, Rodentia, Mammalia) from the Lower Eocene of Mongolia. Paleontological Journal, 3: 60-72.
Wikimedia Foundation. 2010.