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Prolibytherium : ウィキペディア英語版 | Prolibytherium
''Prolibytherium'' ("Before Libya's Beast") is an extinct artiodactyl ungulate native to Early Miocene North Africa, from around 16.9 to 15.97 million years ago.〔(【引用サイトリンク】title=''Prolibytherium'' )〕 The long creature would have superficially resembled an okapi or a deer. Unlike these, however, ''Prolibytherium'' displayed dramatic sexual dimorphism, in that the male had a set of large, leaf-shaped ossicones with a width of , while the female had a set of slender, horn-like ossicones. The taxonomic status of ''Prolibytherium'' remains in flux. At one time, it was described as a relative of ''Sivatherium'' (as a precursor to "Libytherium maurusium" (''S. maurusium'')). Later, it would be regarded as a palaeomerycid, or either as a climacoceratid, or as a basal member of Giraffoidea. With the discovery and study of a female skull in 2010, ''Prolibytherium'' is tentatively regarded as a climacoceratid.〔 ==References==
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