Mammalia - Carnivora - Phocidae

Alternative combinations: Leptonyx weddellii, Otaria weddellii

Belongs to Leptonychotes according to T. A. Demere et al. 2003

Sister taxa: none

Average measurements (in mm): femur length 122.0, humerus length 152.0, radius length 166.0, scapula length 164.0, tibia length 287.0

Estimated body mass: 20.4 kg based on femur length, humerus length, and tibia length