Lipotidae
Lipotidae is a family of river dolphins containing the functionally extinct baiji and the fossil genus Parapontoporia. The genus Prolipotes, which is based on a mandible fragment from Neogene coastal deposits in Guangxi, China, has been classified as an extinct relative of the baiji, but is dubious.
The putative kentriodontid "Lophocetus" pappus is a possible relative of Lipotidae.
