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|regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |ordo = Ammonitida |subordo = Lytoceratina |familia = Lytoceratidae |genus = ''Macroscaphites'' |genus_authority = Meek, 1876 |subdivision_ranks = Species |subdivision = * ''M. (Costidiscus)'' * ''M. (Macroscaphites)'' * ''M. striatisulcatus'' * ''M. yuani'' }} ''Macroscaphites'' is an extinct cephalopod genus included in the Ammonoidea that lived during the Barremian and Aptian stages of the Early Cretaceous (118 - 110 million years ago). Its fossils ave been found throughout most of Europe and North Africa. ''Macroscaphites'' is known to have reached a length of about . The shell is in two basic parts, an early planispirally coiled evolute section followed by a more or less straight section that turns back on itself in a hook. On the basis of studies conducted on the shape of the shell (which take into account the specific weight of the live animal and respective position of the centers of gravity and buoyancy) paleontologists have concluded that this animal lived with the aperture directed toward the surface of the water; the coiled portion upward and the U-shaped-hook directed towards the ocean floor. ==List of species== * ''Macroscaphites yvani'' (Puzos 1832) ; Cuba, Colombia * ''Macroscaphites soaresi'' (Da Silva 1962) ; Mozambique 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「Macroscaphites」の詳細全文を読む スポンサード リンク
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