Filo: Chordata
 Class: Mammalia
 Order: Cetacea
 Family: Platanistidae

 
 

  This family includes 5 species in 4 genera. In many accounts of cetaceans, its members are placed in four separate generas: Iniidae (Bouto or Amazon river dolphin), Lipotidae (Baiji or Chinese river dolphin), Platanistidae (Susu or Ganges river dolphin and Indian river dolphins), and Pontoporidae ( La Plata river dolphin). Members of these families are found in freshwater rivers and coastal waters in Asia and South America.

 These dolphins are generally small, ranging from 1-3 m in length and from roughly 20 to 225 kg in weight, depending on species. They have a long, slender beak, above which rises a sharply differentiated, bulging forehead. The eyes are small, and in some species, appear atrophied. Unlike most other cetaceans, platanistids
have a distinct neck. The flippers are broad and either rounded or sharply curved. The dorsal fin is low in all but the La Plata dolphin, in which it is moderately high. Colors tend to be muted grays, pinks, and browns, usually darker above and paler below.

 Technically, these species are characterized by narrow facial depressions, with the lateral edges of the depression (formed by maxilla and frontal bones) not roofing over the temporal fossa and concealing the zygomatic arch. The zygomatic arch is strongly developed and arched. The rostrum is very long and slender; the
mandibular symphysis is long, from 46 to 72% of the length of the ramus; and the teeth are numerous, ranging from 25/24 to 61/61. The teeth of most species are simple pegs, but in one species the posterior teeth are slightly tricusped, and in another they have a well defined cingulum.

 The rivers used by most platanistids are muddy, and these animals probably rely on echolocation more than vision to locate their prey. They feed on fish and invertebrates, making dives that rarely last more than a few minutes. Group size varies from single individuals to 10 or 12. In general, little is known about their ecology and social behavior.

 
Click on the common name of the river dolphin to get more information=)
GENI
COMMON

NAME
SCIENTIFIC

NAME
HABITAT
Iniidae
Bouto
Inia geoffrensis
Amazonas River
Lipotedae
Baiji or Whitefin Dolphin
Lipotes vexillifer
Yangtze River China
Pontoporiidae
Franciscana or La Plata River Dolphin
Pontoporia blainvillei
La Plata River
Platanistoidae
Indus River Dolphin
Platanista minor
Indo River Pakistan
Platanistoidae
Susu or Hihu
Platanista gangetica
Ganges River India