The phylogenetic reconstruction supported Delphinidae and Phocoenidae respective monophyletic groups, and proposed a sister relationship between these two families.
系统重建分析支持海豚科和鼠豚科为单系发生，且两者构成姐妹群关系；
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Any of various Marine cetacean mammals, such as the bottle - nosed dolphin, of the family Delphinidae, related to the whales but generally smaller and having a beaklike snout.