| Armintomys | |
|---|---|
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Suborder: | Myomorpha |
| Family: | †Armintomyidae Dawson, Krishtalka, & Stucky, 1990 |
| Genus: | †Armintomys Dawson, Krishtalka, & Stucky, 1990 |
| Species: | †A. tullbergi |
| Binomial name | |
| †Armintomys tullbergi Dawson, Krishtalka, & Stucky, 1990 | |
Armintomys is anextinct genus ofrodent fromNorth America related tojerboas andjumping mice. It is the only genus in the familyArmintomyidae. It lived during the earlyEocene, and is the oldest known example of ahystricomorphous zygomasseteric dentition.[1] In addition, Armintomys is also the oldest known rodent that had an incisor enamel transition from pauciserial to uniserial.[2] Its remains have only been found in theWind River Basin inWyoming, and could be found there during the species' existence onEarth.[3] It was previously assumed that Armintomys belonged to theDipodoidea family, but has since been understood to have been part of an early radiation of dipodoidrodents, but was not directly ancestral to any later dipodoids, thus it was recategorized into its own family.[4]
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