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''Raeticodactylus'' (meaning 'Raetia finger') is a genus of non-pterodactyloid pterosaur from the late Norian-early Rhaetian-age Upper Triassic lower Kössen Formation of the central Austroalpine of Grisons, Switzerland. It is known from holotype BNM 14524, a single disarticulated partial skeleton including an almost complete skull, found in August 2005. This genus was named and described in 2008 by its discoverer Rico Stecher; the type species is ''Raeticodactylus filisurensis''. The specific name refers to Filisur.〔 Online First〕 ''Raeticodactylus'' had a tall thin bony crest running along the midline of the front of the upper jaw, and a keel on the lower jaw; however, it does not seem to be closely related to ''Austriadactylus'', the only other crested Triassic pterosaur named by the time ''Raeticodactylus'' was described. The teeth at the front of the upper jaw, in the premaxillae, were fanglike, whereas the teeth in the upper cheeks (the maxillae) had three, four, or five cusps, similar to those of ''Eudimorphodon''. ''Raeticodactylus'' had a wingspan of about 135 centimeters (53 in), and may have been a piscivore, potentially feeding by skimming the water.〔 A 2009 study by Fabio Dalla Vecchia, which analyzed the relationships within the family Campylognathoididae, found that ''Raeticodactylus'' is very closely related to ''Caviramus''. ''Caviramus'' is known only from a partial jaw, exhibiting the same type of teeth and unique cavities in the jaw bone, and both specimens come from the same time and place (the Alplihorn Member of the Swiss Kössen Formation). Dalla Vecchia concluded that the two belong to the same genus, and possibly the same species, if the subtle differences (such as size and the presence of a crest in the ''Raeticodactylus'' specimen) are not due to sex or age.〔Dalla Vecchia, F.M. (2009). "Anatomy and systematics of the pterosaur ''Carniadactylus'' (gen. n.) ''rosenfeldi'' (Dalla Vecchia, 1995)." ''Rivista Italiana de Paleontologia e Stratigrafia'', 115(2): 159-188.〕 A study by Brian Andres e.a. from 2014 concluded that ''Raeticodactylus'' was the sister species of ''Caviramus'' within a Raeticodactylidae.〔Andres, B.; Clark, J.; Xu, X., 2014, "The Earliest Pterodactyloid and the Origin of the Group", ''Current Biology'', doi:10.1016/j.cub.2014.03.030〕 ==See also== * List of pterosaurs 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「Raeticodactylus」の詳細全文を読む スポンサード リンク
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