Gastroserica roessneri is a species of beetle of the family Scarabaeidae. It is found in Vietnam.
Adults reach a length of about 8.4âÂÂ9.7 mm. They have an iridescent, chestnut brown, egg-shaped, oval body. They are nearly glabrous, except for some setae on the disc of the pronotum and the margins of the elytra.
The species is named after a friend and colleague of the author, Eckehard Rossner.