Diplasiotherium is an extinct genus of litoptern belonging to the family Proterotheriidae, that lived between the late Miocene and the early Pliocene (in the SALMAs Huayquerian and Montehermosan).[1] The fossils of this animal have been found in Argentina, in the Monte Hermoso Formation.[2][3]

Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Litopterna
Family: Proterotheriidae
Subfamily: Proterotheriinae
Genus: Diplasiotherium
Rovereto, 1914
Type species
Diplasiotherium robustum
Rovereto 1914
  • D. pampa Soria 2001
  • D. robustum Rovereto 1914 (type)

Diplasiotherium is distinguished from other proterotheriids by the crown of its molars, which were higher than in other related genera (protohypsodont), and by its larger body size; the species D. robustum reached approximately 395 kilograms (871 lb) in weight, making it the largest known proterotheriid.[1][4]


  1. ^ a b Villafañé et al., 2006, p.161
  2. ^ Rovereto, Cayetano. 1914. Los estratos Araucanos y sus fósiles. Anales del Museo Nacional de Historia Natural de Buenos Aires 25: 1–247.
  3. ^ Deschamps & Tomassini, 2016, p.224
  4. ^ Villafañe, A. L. (2005). Paleoecología de los Proterotheriidae (Mammalia, Litopterna): Un estudio basado en los cambios en la masa corporal. Tesis de Licenciatura (inédita), Facultad de Ciencias Naturales (sede Trelew), Universidad de la Patagonia San Juan Bosco, 145 págs.