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Tephrocyon
''Tephrocyon'' is an extinct genus of the Borophaginae and a small to medium-sized terrestrial canine (Bear-dog) which inhabited most of North America during the Barstovian stage of the Middle Miocene 16.3—13.6 Ma, existing for approximately .〔(PaleoBiology Database: ''Tephrocyon'' Taxonomy, Species )〕 ==Morphology== Fossil specimens of two individuals' body mass were examined by Legendre and Roth. The first specimen was estimated to weigh . The second specimen was estimated to weigh .〔S. Legendre and C. Roth. 1988. Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia). Historical Biology〕
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