Synoplotherium
Encyclopedia
Synoplotherium is an extinct genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of relatively small, wolf-like mesonychid
Mesonychid
Mesonychia are an extinct order of medium to large-sized carnivorous mammals that were closely related to artiodactyls and to cetaceans...

s that lived 50 million years ago, in what is now Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

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Synoplotherium was related to, coexisted, and possibly competed with the larger Mesonyx
Mesonyx
Mesonyx was a wolf-like mammal of the family Mesonychidae, the type family of the order Mesonychia , existing 51.8—51.7 Ma . It may have been ancestral to cetaceans....

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