Toxidium scalenum is a species of beetle in the family Staphylinidae. This species is found in south-eastern Brazil (Minas Gerais).
Adults reach a length of about 1.9 mm and have a reddish-brown body and ochreous legs.
Adults have been collected from an undetermined crust/resupinate fungus.
The species epithet is a Latin word meaning âÂÂunusualâÂÂ, due to the distinct aedeagus shape.