Family Pontoporiidae - Baiji and Franciscana (2 species in 2 genera)
This family contains 2 types of dolphins, one a true river dolphin of the Yangtze River in China, the other a coastal marine species of the east coast of South America. Females are larger than males in both species. Both have long beaks (extremely so in the franciscana) and rather low, triangular dorsal fins.
Genus Lipotes containing 1 species:
Lipotes vexillifer (Baiji)
Genus Pontoporia containing 1 species:
Pontoporia blainvillei (Franciscana)