Pronesodon Ameghino
Pronesodon Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 626.
The genus is said to resemble Proadinotherium, but with the caniniform incisors proportionally much shorter. An associated calcaneum is shorter than that of Adinotherium and longer than that of Nesodon.
Two species are described.
Pronesodon cristatus Ameghino
P. cristatus Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. 626.
P. cristatus Amegh., 1897, Bol. Inst. Geog. Argen., t. 15, p. 467.
This species is very imperfectly known, is characterized by a large external anterior style, molars said to be 15 mm. wide.
Pronesodon robustum Ameghino
P. robustum Amegh., loc. cit. above.
This is a larger species, of which the three lower molars are known, and which measure 16, 22, and 30 mm. in length respectively, while they are 9-10 mm. wide.