Gastroserica bannok is a species of beetle of the family Scarabaeidae.BioLib It is found in Laos.

Description Adults reach a length of about 5 mm. They have a yellow, oval body. The antennal club is brown and the margins of the elytra and the frons blackish. The dorsal surface is shiny and nearly glabrous.

Etymology The name of the species is derived from the type locality, Ban Nok.

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