Amblymelanoplia pseudocostata is a species of beetle of the family Scarabaeidae. It is found in South Africa (Western Cape). The habitat consists of Boland Granite Fynbos.
Adults reach a length of about . They are mostly dull black, with the elytra and legs dark red brown. The clypeus and head have red-brown setae. The pronotum has brown setae and some white scales at the posterior margin. The elytra have pale-brown setae.
The species name is refers to its similarity to Amblymelanoplia costata.