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lepidosireniformes
Lepidosireniformes are an order of lungfish containing the families Lepidosirenidae (the South American lungfish) and Protopteridae (the African lungfish). Both of the two families are monogeneric, and the sole genera of the family Lepidorenidae is also monospecific.
== Taxonomy ==
Their closest living relatives are of the order Ceratodontiformes, or the Australian lungfish; they are believed to have diverged from the other order approx. 400 MYA. The Lepidosireniformes are more are more closely related to the Australian lungfish and its relatives than most orders of fossil lungfish.〔 They are known from as early as the Early Devonian.〔 Fossil ancestors of the order have been located in Cretaceous African and South American for the Protopteridae and Lepidosirenidae, respectively.〔
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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