†Seumadia Simpson 1935 (marsupial)
Mammalia - Polydolopimorphia - Polydolopidae
Full reference: G. G. Simpson. 1935. Descriptions of the oldest known South American mammals, from the Rio Chico Formation. American Museum Novitates 793:1-25
Parent taxon: Polydolopidae according to C. d. Paula Couto 1952
Sister taxa: Amphidolops, Eudolops, Polydolopinae, Polydolops, Roberthoffstetteria
Subtaxa: Seumadia yapa
Type: Seumadia yapa
Ecology: scansorial omnivore