Astaena alternata is a species of beetle of the family Scarabaeidae. It is found in Panama.
Adults reach a length of about 8.75âÂÂ9 mm. They are reddish brown. The head, legs and abdomen are shiny, while the pronotum, elytra, pygidium and venter of the thorax are opaque, weakly pruinose and opalescent.
The name of the species refers to the higher and lower intervals across the disc of the elytra.