Proterotheriidae

Proterotheriidae is an extinct family of litoptern ungulates known from the Oligocene-Late Pleistocene of South America. Members of the group were small-medium sized cursorial herbivores with brachydont teeth, with their toes showing progressive reduction, with later members of the group bearing weight on a single large toe similar to living horses.

Proterotheriidae
Temporal range:
Skeleton of Thoatherium
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Litopterna
Suborder: Lopholipterna
Superfamily: Proterotherioidea
Family: Proterotheriidae
Ameghino 1887
Synonyms
  • Anisolambdidae Soria, 2001
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