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Peale's dolphin
Peale's dolphin (''Lagenorhynchus australis'') is a small dolphin found in the waters around Tierra del Fuego at the foot of South America. It is also commonly known as the black-chinned dolphin or even Peale's black-chinned dolphin. However, since Rice's work 〔"Marine Mammals of the World. Systematics and Distribution", by Dale W. Rice (1998). Published by the Society of Marine Mammalogy as Special Publication No. 4〕 Peale's dolphin has been adopted as the standard common name.
==Taxonomy==
Though it is traditionally placed in the genus ''Lagenorhynchus'', recent molecular analyses indicate Peale's dolphin is actually more closely related to the dolphins of the genus ''Cephalorhynchus''. If true, this would mean this species must either be transferred to ''Cephalorhynchus'' or be given a new genus of its own. An alternate genus proposed for this species (as well as the Pacific white-sided dolphin and dusky dolphin is ''Sagmatias''. Some behavioral and morphological data support moving Peal's dolphin to ''Cephalorhynchus''. According to , Peale's dolphin and the ''Cephalorhynchus'' species are the only dolphins that do not whistle. Peale's dolphin also shares with several ''Cephalorhynchus'' species the possession of a distinct white "armpit" marking behind the pectoral fin.
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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