Wainka Temporal range: Middle Paleocene ~62 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	†Litopterna
Family:	†Proterotheriidae
Subfamily:	†Anisolambdinae
Genus:	†Wainka Simpson 1935
Type species
†Wainka tshotshe Simpson, 1935
Species
W. tshotshe Simpson 1935

Wainka is an extinct genus of South American mammal, belonging to the order Litopterna. It lived during the Middle Paleocene.

Description

This animal is only known for a few teeth. The upper molars were almost triangular in shape, elongated, and possessed a rather massive paracone and metacone, more developed than other contemporary South American ungulates such as Anisolambda ; the upper molars were devoid of mesostyle.

With some doubts, Wainka has also been attributed a lower molar with well-marked ridges.

Classification

Wainka tshotshe was first described in 1935 by George Gaylord Simpson, based on an upper and lower molar, the latter of dubious attribution, from the Middle Paleocene of Cerro Redondo, Argentina. This animal has been attributed to various families of South American ungulates, such as the Notonychopidae and Proterotheriidae. Regardless, Wainka was a basal form and it is very likely that it was an early litoptern. Its real affinities are still unclear. Other litopterns from approximately the same age are Notonychops and Requisia.