• The monjon is the smallest species in its genus, with a body and head length of 300 to 350 millimeters and a weight of 950 to 1400 grams. The length of its hind foot is 80 to 92 mm.

The Barbial wallaby is a species with a body length ranging from 30 to 35 cm and a weight from 0.9 to 1.35 kg. During embryonic development, this species exhibits the following indicators: body weight 0 g, body length from 1 mm to 1.5 cm. Newborn Barbial wallaby joeys have a body weight from 1 to 350 g and a body length from 3 to 20 cm. Adult individuals reach a body weight from 0.9 to 1.35 kg and a body length from 30 to 35 cm.