系统发生分析支持淡水豚类和海豚类之间具有下述的关系:(恒河豚科((白暨豚科(亚河豚科,弗西豚科))海豚总科))。
The phylogenetic analysis supported the following relationship of river dolphins and Delphinoidea : ( Platanistidae (( Lipotidae ( Iniidae , Pontoporiidae )) Delphinoidea )) .