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''Sagmatias'' is a genus that has been proposed for certain dolphin species that are currently placed in the genus ''Lagenorhynchus''. Mitochondrial DNA studies have indicated that certain dolphin species within ''Lagenorhynchus'' are actually more closely related to dolphins within the genus ''Cephalorhynchus''. In order to resolve this situation it has been proposed that the affected dolphin species be placed within the genus Sagmatias. A recent cladistic analysis of oceanic dolphins provides morphological support for generic separation of ''Sagmatias'' from ''Lagenorhynchus''.〔Mizuki Murakami, Chieko Shimada, Yoshinori Hikida, Yuhji Soeda and Hiromichi Hirano (2014). "Eodelphis kabatensis, a new name for the oldest true dolphin Stenella kabatensis Horikawa, 1977 (Cetacea, Odontoceti, Delphinidae), from the upper Miocene of Japan, and the phylogeny and paleobiogeography of Delphinoidea". Journal of Vertebrate Paleontology 34 (3): 491–511. doi:10.1080/02724634.2013.816720.〕 Affected species are: * Pacific White-sided Dolphin (''Lagenorhynchus obliquidens'') 〔(【引用サイトリンク】year=2005 ) 〕 * Peale's Dolphin (''Lagenorhynchus australis'') * Dusky Dolphin (''Lagenorhynchus obscurus'') In addition, there is evidence that the Hourglass Dolphin (''Lagenorhynchus cruciger'') should also be placed within the new genus, although the evidence for this species is less conclusive. Under this categorization, ''Sagmatias'', ''Cephalorhynchus'' and ''Lissodelphis'' form the subfamily Lissodelphininae within the dolphin family, Delphinidae.〔 ==References== COPE, E. D. 1866. Third contribution to the history of the Balaenidae and Delphinidae. Proceedings of the Academy of Natural Sciences of Philadelphia, 1866:293-300. 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「Sagmatias」の詳細全文を読む スポンサード リンク
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