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Rhacheosaurus
''Rhacheosaurus'' is an extinct genus of marine crocodyliform belonging to the family Metriorhynchidae. The genus was established by Christian von Meyer in 1831 for skeletal remains from the Tithonian (Late Jurassic) of Germany.〔Meyer, H von 1831. ''Neue fossile Reptilien aus der Ordung der Saurier'' Nova Acta Academiae Leopoldino-Carolinae Curios 15 (2): 173-184.〕
==History and classification==
A phylogenetic analysis in 2009 showed that several long-snouted species formerly classified in the related genera ''Geosaurus'', ''Enaliosuchus'', and ''Metriorhynchus'' were in fact more closely related to the original specimens of ''Cricosaurus'', and thus were re-classified into this genus.〔Young, M.T. and Andrade, M.B. de (2009). "What is ''Geosaurus''? Redescription of ''Geosaurus giganteus'' (Thalattosuchia: Metriorhynchidae) from the Upper Jurassic of Bayern, Germany." ''Zoological Journal of the Linnean Society'', 157: 551-585.〕 This analysis also resurrected the generic name ''Rhacheosaurus''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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