Maechidius yamdena is a species of beetle of the family Scarabaeidae. It is found in Indonesia (Tanimbar).
Adults reach a length of about 8.05âÂÂ9.20 mm. The dorsum and venter are uniformly black-brown, while the labroclypeus, mouthparts, antennae, tibiae and tarsi are reddish brown.
The species is named after the Yamdena, the main tribe and language of the main island in the Tanimbar group.