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''Cearadactylus'' is a genus of large Early Cretaceous (Albian) pterosaurs from South America. The only known species is ''Cearadactylus atrox'', described and named in 1985 by Giuseppe Leonardi and Guido Borgomanero. The name refers to the Brazilian state Ceará and combines this with Greek ''daktylos'', "finger", a reference to the wing finger of pterosaurs. The Latin ''atrox'' means "frightful", a reference to the fearsome dentition of the species. ==Description== The holotype is MN 7019-V (earlier CB-PV-F-O93), from the Romualdo Member of the Santana Formation. This fossil, a single skull with a length of 57 centimetres, was discovered on the Araripe plateau in northeastern Brazil.〔Leonardi, G. & Borgomanero, G. (1985). "''Cearadactylus atrox'' nov. gen., nov. sp.: novo Pterosauria (Pterodactyloidea) da Chapada do Araripe, Ceara, Brasil." ''Resumos dos communicaçoes VIII Congresso bras. de Paleontologia e Stratigrafia'', 27: 75–80.〕 It was traded to Italy in 1983 and bought by Borgomanero for his collection. The skull is severely damaged, especially on the top, and was perhaps reconstructed by the fossil dealer. As shown by a later preparation by the Brazilian Museu Nacional, in the first preparation many serious mistakes were made. The fronts of the snout and of the lower jaws were confused leading to a reconstruction in which the anterior part of the head was upside down. The teeth were extensively restored and enlarged until the wider front of the jaws showed very large and robust teeth projecting outwards, forming a sort of "rosette". This kinked upper jaw and its interlocking teeth suggested a piscivourous diet, allowing the animal to keep hold of slippery fish. No crests seemed to be present. The new preparation made clear that a crest was present on the snout and that the rosette was a lot smaller. Many details were discovered that were useful in determining the phylogenetic position of ''Cearadactylus''.〔Bruno C. Vila Nova, Alexander W.A. Kellner, Juliana M. Sayão, 2010, "Short Note on the Phylogenetic Position of ''Cearadactylus Atrox'', and Comments Regarding Its Relationships to Other Pterosaurs", ''Acta Geoscientica Sinica'' 31 Supp.1: 73-75〕 The wingspan of ''Cearadactylus'' was by the describers estimated to have been around , with a weight of perhaps . Peter Wellnhofer in 1991 estimated a wingspan of 5.5 metres (18 ft). Leonardi did abstain from assigning the genus to a family. Wellnhofer created a special family Cearadactylidae, but this concept is no longer used. In 2000 Alexander Kellner concluded that it was related to, but lacking a crest not part of, the Anhangueridae within a larger Pteranodontoidea ''sensu'' Kellner. In 2002 David Unwin however stated it was a highly deviant member of Ctenochasmatidae. In 2010 Kellner entered the new information into three existing databases of pterosaur features, to calculate through cladistic analysis the position of ''Cearadactylus'' in the phylogenetic tree. Although the three resulting trees differed, all had in common that ''Cearadactylus'' was close to the Anhangueridae. 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「Cearadactylus」の詳細全文を読む スポンサード リンク
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