Microtomarctus is an extinct monospecific genus of the Borophaginae subfamily of canids native to North America. It lived during the Early to Middle Miocene,^[1] and existed for approximately 7 million years. Fossil specimens have been found in Nebraska, coastal southeast Texas, California, New Mexico, Nevada and Colorado. It was an intermediate-size canid, and more predaceous than earlier borophagines.^[2]

Quick Facts Scientific classification, Binomial name ...

Microtomarctus Temporal range: Early Miocene–Middle Miocene PreꞒ Ꞓ O S D C P T J K Pg N
Replica of lower jaw at the Natural History Museum of Los Angeles County
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Family:	Canidae
Subfamily:	†Borophaginae
Tribe:	†Borophagini
Genus:	†Microtomarctus Wang et al., 1999
Species:	†M. confertus
Binomial name
†Microtomarctus confertus Matthew, 1918

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Like some other borophagines it had powerful, bone-crushing jaws and teeth.^{[citation needed]}