Squalodelphinidae is a family of primitive platanistoid river dolphins found in marine deposits in the eastern Pacific, western Atlantic, and Europe.[1]

Temporal range: ?late Chattian-Langhian, 23–11.6 Ma
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Cetartiodactyla
Infraorder: Cetacea
Superfamily: Platanistoidea
Family: Squalodelphinidae
Dal Piaz, 1917


Distinguishing features of Squalodelphinidae include a moderately elongated and tapered rostrum, posterior cheek teeth being single-rooted but retaining accessory denticles, and marked skull asymmetry. Members of the family can be differentiated from the South Asian river dolphin by their shorter rostrum.[2]


  1. ^ "Fossilworks: Squalodelphinidae". fossilworks.org.
  2. ^ O. Lambert, G. Bianucci, and M. Urbina. 2014. Huaridelphis raimondii, a new early Miocene Squalodelphinidae (Cetacea, Odontoceti) from the Chilcatay Formation, Peru. Journal of Vertebrate Paleontology 34(5):987-1004