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''Boreopterus'' is a genus of pterodactyloid pterosaur from the Barremian-Aptian-age Lower Cretaceous Yixian Formation of Dalian, Liaoning, China. The genus was in 2005 named by Lü Jinchang and Ji Qiang. The type species is ''Boreopterus cuiae''. The genus name is derived from Greek ''boreios'', "northern" and ''pteron'', "wing". The specific epithet honours Cui Xu. The genus is based on holotype JZMP-04-07-3, a nearly complete but crushed skeleton and skull. The skull is 235 millimeters long (9.25 inches), low and elongated with a rounded tip. Its wingspan is estimated to have been around 1.45 meters (4.76 feet). Its teeth, especially the anterior nine pairs, are quite large, forming a mesh of sharp teeth at the front of the mouth; the third and fourth teeth from the front are the largest. There are at least 27 teeth in each side of both the upper and lower jaws, which is a large amount. ==Classification== Lü and Ji initially placed ''Boreopterus'' in the Ornithocheiridae when they described it in 2006, a classification which was supported later that year by David Unwin. However, Lü in 2006 published a cladistic analysis showing ''Boreopterus'' to be the sister taxon of ''Feilongus'' (together forming the new family, Boreopteridae) in a position more basal than ''Haopterus''. In 2013, a more comprehensive study of pterosaur relationships supported the close relationship of ''Boreopterus'' and ''Feilongus'', as well as their relatively basal status among pterodactyloids. Andres & Myers (2013) found the "boreopterids" as the sister group of ''Cycnorhamphus'' within the archaeopterodactyloid group Gallodactylidae. However, subsequent analysis have found Boreopteridae to be indeed "pteranodontian" ornithocheiroids, composed of ''Boreopterus'', ''Zhenyuanopterus'' and ''Guidraco'', while ''Feilongus'' is a relative of ''Gnathosaurus''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Boreopterus」の詳細全文を読む スポンサード リンク
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