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Borophagus secundus : ウィキペディア英語版 | Borophagus secundus
''Borophagus secundus'' ("devouring glutton") is an extinct species of the genus ''Borophagus'' of the subfamily ''Borophaginae'', a group of canids endemic to North America from the Early Miocene epoch (23.0 Mya) through the Late Miocene epoch (5.3 Mya). ''Borophagus secundus'' existed for approximately .〔(PaleoBiology Database: ''Borophagus secundus'', basic info )〕 ==Overview== ''Borophagus secundus'', like other ''Borophaginae'', are loosely known as "bone-crushing" or "hyena-like" dogs. Though not the most massive borophagine by size or weight, it had a more highly evolved capacity to crunch bone than earlier, larger genera such as ''Epicyon'', which seems to be an evolutionary trend of the group (Turner, 2004). During the Pliocene epoch, ''Borophagus'' began being displaced by ''Canis'' genera such as ''Canis edwardii'' and later by ''Canis dirus''. Early species of ''Borophagus'' were placed in the genus ''Osteoborus'' until recently, but the genera are now considered synonyms.〔
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