Gastroserica loei is a species of beetle of the family Scarabaeidae.BioLib It is found in Thailand.

Description Adults reach a length of about 4.5–5.4 mm. They have a yellowish brown, oval body. The antennal club, frons and margins of the elytra are blackish and the dorsal surface is shiny and nearly glabrous.

Etymology The species is named after its occurrence in the Loei province.

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