Eocene rodents

Paramys is an extinct genus of rodents from North America, Europe, and Asia. It is one of the oldest genera of rodents known and probably lived in trees. While the genus name literally means "near a mouse", it coexisted with Thisbemys, a similar rodent, thus yielding a reference to Pyramus and Thisbe.

Alagomyidae is a family of rodents known from the late Paleocene and early Eocene of Asia and North America (McKenna and Bell, 1997). Alagomyids have been identified as the most basal rodents, lying outside the common ancestry of living forms (Meng et al., 1994). Because of their phylogenetic position and their conservative dental morphology, alagomyids have played a key role in investigations of the origins and relationships of rodents (Meng et al., 1994; Meng and Wyss, 2001).

Ischyromys is an extinct genus of rodent from North America. thumb|left|Skull

Ailuravus is a genus of prehistoric rodents in the family Ischyromyidae.

Birbalomys is an extinct genus of rodent from Asia.

thumb|Juvenile