Trigonostylops

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Trigonostylops is an extinct genus of South American meridiungulatan ungulate, from the Late Paleocene to Late Eocene (Itaboraian to Tinguirirican in the SALMA classification) of South America (Argentina and Peru) and Antarctica (Seymour Island). It is the only member of the family Trigonostylopidae.

Description

A complete skull of the type species, T. wortmani, has been found, and it has been classified as an astrapothere based on its large lower incisors.

Phylogeny

Cladogram based in the phylogenetic analysis published by Vallejo Pareja et al., 2015, showing the position of Trigonostylops:

Distribution

Fossils of Trigonostylops have been found in:

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