The Ooldea dunnart (Sminthopsis ooldea), also called Troughton's dunnart after the person who found the species, is an Australian marsupial similar to the hairy-footed dunnart. It is greyish-yellow on its upper body and white on the underside with dark patches on its crown, forehead and in front of the eyes, and a pink thinly furred carrot shaped tail. Its total length is 115-173 mm; its average body length is 55-80 mm with a tail of 60-93 mm. Its ear length is 14-17 mm.