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| authority = Bergounioux, 1955 | subdivision_ranks = Species | subdivision = * ''P. gavialoides'' Bergounioux, 1955 (type) }} ''Phosphatosaurus'' is an extinct genus of dyrosaurid crocodylomorph. It existed during the early Eocene, with fossils having been found from North Africa in Tunisia and Mali. Named in 1955, ''Phosphatosaurus'' is a monotypic genus; the type species is ''P. gavialoides''. A specimen has been discovered from Niger, but it cannot be classified at the species level. ''Phosphatosaurus'' is closely related to the Cretaceous genus ''Sokotosuchus'', which is known from Niger and Mali. Because ''Phosphatosaurus'' is only known from Paleogene localities, the close relationship with ''Sokotosuchus'' implies that there is a long ghost lineage extending back into the Maastrichtian that is not known in the fossil record. ==Description== ''Phosphatosaurus'' is a large-bodied dyrosaurid with blunt teeth.〔〔 The tip of the snout is spoon-shaped from a lateral expansion of the rostral portion of the mandible. The dentition is nonhomodont. Alveolar "couplets" are present in the lower jaw of ''Phosphatosaurus'' in which paired tooth sockets, or alveoli, are closer to one another than to the alveoli next to them. This is not seen in any other dyrosaurid but is seen in some other longirostrine (long snouted) crocodylomorphs such as the gavialoid ''Eosuchus''. It is possible that the diastemata between the couplets served to receive larger maxillary teeth.〔 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「Phosphatosaurus」の詳細全文を読む スポンサード リンク
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