| Ivanantonia | |
|---|---|
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Family: | incertae sedis |
| Genus: | †Ivanantonia Shevyreva, 1989 |
| Species: | †I. efremovi |
| Binomial name | |
| †Ivanantonia efremovi Shevyreva, 1989 | |
Ivanantonia is the onlygenus in the extinctrodentfamilyIvanantoniidae 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 lowerpremolars and in showing evidence ofpropalinal chewing.[1] The relationships ofIvanantonia are unclear. It was described as actenodactyloid. Hartenberger et al. suggested a potential relationship to themuroidNonomys but declined to assign Ivanantoniidae to a suborder withinRodentia.[1]
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