''Eucastor'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of beaver-grouped

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 lower jaws. About 40% of all mammal species are roden ...

s. Based on the available evidence of the

foramina In anatomy and osteology, a foramen (;Entry "foramen"
in

, ''Eucastor'' most likely is closely related to ''Castor'', but not in its direct lineage.

References

* McKenna, Malcolm C., and Bell, Susan K. 1997. ''Classification of Mammals Above the Species Level''. Columbia University Press, New York, 631 pp. Prehistoric beavers Prehistoric rodent genera Taxa named by Joseph Leidy {{paleo-rodent-stub