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''Hauffiopteryx'' is an extinct genus of ichthyosaur known from Germany, Luxembourg and Somerset of the United Kingdom.〔 ==Description== ''Hauffiopteryx'' was first described by Michael W. Maisch on the basis of some specimens that previously referred to ''Stenopterygius hauffianus''. Maisch found that the lectotype of ''S. hauffianus'' can be determined as ''Stenopterygius cf. S. quadriscissus'' at best, and therefore this species should be considered a nomen dubium. He also found out that most specimens previously referred to ''S. hauffianus'' can be referred to ''S. quadriscissus'', while the rest belongs to a highly distinctive new taxon that can't be referred to any valid species of ''Stenopterygius''.〔 ''Hauffiopteryx'' is known from the lectotype GPIT 1491/4, articulated complete skeleton which preserved the skull and some soft tissues. The animal is about in length. It was collected from the ''Harpoceras elegantulum-exaratum'' ammonoid subzones (more specifically Lias ε II4), ''Harpoceras falcifer'' zone, of the famous Posidonien-Schiefer lagerstätte (Posidonia Shale) of Holzmaden, dating to the early Toarcian stage of the Early Jurassic, about 182 million years ago. Referred specimens from Holzmaden, Germany and Dudelange, Luxembourg include MHH '9', WAT 1, SMNS 51552, SMNS 80225 and probably the poorly preserved SMNS 81965. They were collected from the ''Harpoceras semicelatum-elegantulum-exaratum'' ammonoid subzones (Lias ε II1-5, about 182.7-181.8 mya), ''Harpoceras tenuicostatum-falcifer'' zones, of the Posidonia Shale.〔 Additional materials were described by Hannah Caine and Michael J. Benton in 2011, from the early Toarcian of Strawberry Bank, Ilminster of England. The specimens are all juveniles or infants which preserved almost complete skeletons and some skulls. They include BRLSI M1399 (which was described earlier by Maisch), BRLSI M1400, BRLSI M1401, BRLSI M1403, BRLSI M1404 and BRLSI M1406. Both the original description by Maisch and the redescription of the English specimens found that ''Hauffiopteryx'' might be either a basalmost member of Eurhinosauria or a basalmost member of Thunnosauria (which is an equivalent position to a basalmost member of Stenopterygiidae sensu Maisch () with exclusion of ''Ichthyosaurus'').〔〔 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「Hauffiopteryx」の詳細全文を読む スポンサード リンク
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