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(synonymous with boreotheria)
(Greek: βόρειο “north” + ευ “good” + θεριό “beast”)
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(“boreoeutheria” is a ‘clade’ (aka ‘magnorder’) of ‘placental mammals’ that is composed of the sister taxa ‘Laurasiatheria’ (most ‘hoofed mammals’, most ‘pawed carnivores’, and several other groups) and ‘Euarchontoglires’ (‘Supraprimates’))
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(it is now well supported by ‘DNA sequence analyses’, as well as ‘retrotransposon presence’ or ‘absence data’)
(the earliest known fossils belonging to this group date to about 65 million years ago, shortly after the ‘K-Pg extinction event’, though molecular data suggests they may have originated earlier, during the ‘Cretaceous’ period)
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(with the exception of ‘rhinoceroses’ + ‘cetaceans’, male members of the ‘clade’ share the distinction of ‘external testicles’)
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