Eomyidae is a

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

rodent Rodents (from Latin , 'to gnaw') are mammals of the Order (biology), order Rodentia ( ), which are characterized by a single pair of continuously growing incisors in each of the upper and Mandible, lower jaws. About 40% of all mammal specie ...

s from

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

and

Eurasia Eurasia ( , ) is a continental area on Earth, comprising all of Europe and Asia. According to some geographers, Physical geography, physiographically, Eurasia is a single supercontinent. The concept of Europe and Asia as distinct continents d ...

related to modern day

pocket gopher Pocket gophers, commonly referred to simply as gophers, are burrowing rodents of the family Geomyidae. The roughly 41 speciesSearch results for "Geomyidae" on thASM Mammal Diversity Database are all endemic to North and Central America. They ar ...

s and

kangaroo rats Kangaroo rats, small mostly nocturnal rodents of genus ''Dipodomys'', are native to arid areas of western North America. The common name derives from their bipedal form. They hop in a manner similar to the much larger kangaroo, but developed thi ...

. They are known from the

Middle Eocene The Eocene ( ) is a geological epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', ' Dawn') a ...

to the

Late Miocene The Late Miocene (also known as Upper Miocene) is a sub-epoch of the Miocene epoch (geology), Epoch made up of two faunal stage, stages. The Tortonian and Messinian stages comprise the Late Miocene sub-epoch, which lasted from 11.63 Ma (million ye ...

in North America and from the

Late Eocene The Priabonian is, in the International Commission on Stratigraphy, ICS's geologic timescale, the latest age (geology), age or the upper stage (stratigraphy), stage of the Eocene epoch (geology), Epoch or series (stratigraphy), Series. It spans ...

to the

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

in Eurasia. Eomyids were generally small, but occasionally large, and tended to be squirrel-like in form and habits. The family includes the earliest known gliding rodent, '' Eomys quercyi''. The family includes the following genera: *'' Simiacritomys'' (placement uncertain) *'' Symplokeomys'' *Subfamily Yoderimyinae **'' Litoyoderimys'' **'' Yoderimys'' **'' Zaisaneomys'' **'' Zemiodontomys'' *Subfamily Apeomyinae **'' Apeomyoides'' **'' Apeomys'' **'' Arikareeomys'' **'' Megapeomys'' **'' Zophoapeomys'' *Subfamily Eomyinae **'' Adjidaumo'' **'' Aguafriamys'' **'' Asianeomys'' **'' Aulolithomys'' **'' Centimanomys'' **'' Comancheomys'' **'' Cristadjidaumo'' **'' Cupressimus'' **'' Eomyodon'' **'' Eomyops'' **'' Eomys'' **'' Estramomys'' **'' Japaneomys'' **'' Kansasimys'' **'' Keramidomys'' **'' Leptodontomys'' **'' Ligerimys'' **'' Metadjidaumo'' **'' Metanoiamys'' **'' Meteomys'' **'' Montanamus'' **'' Namatomys'' **'' Neoadjidaumo'' **'' Orelladjidaumo'' **'' Paradjidaumo'' **'' Paranamatomys'' **'' Pentabuneomys'' **'' Protadjidaumo'' **'' Pseudadjidaumo'' **'' Pseudotheridomys'' **'' Rhodanomys'' **'' Ritteneria'' **'' Ronquillomys'' **'' Viejadjidaumo''

References

Literature cited

* * * * * * * * * * Geomyoid rodents Prehistoric rodent families Eocene first appearances Pleistocene extinctions Taxa named by Herluf Winge {{paleo-rodent-stub