Lumkuia is an extinct genus of probainognathian cynodont. It is the earliest and most basal known member of Probainognathia, with fossils being found from the Cynognathus Assemblage Zone of the Beaufort Group in the South African Karoo Basin that date back to the early Middle Triassic. Lumkuia is not as common as other cynodonts from the same locality such as Diademodon and Trirachodon. Previously, early probainognathians were only known from younger strata in South America that were deposited in the late Middle and Late Triassic. The genus has been placed in its own family, Lumkuiidae.