Gastroserica sulcata is a species of beetle of the family Scarabaeidae.BioLib It is found in China (Guangxi, Guizhou, Hubei, Hunan, Zhejiang).
Description Adults reach a length of about 6.6–7 mm. They have an elongate-oval body. The dorsal surface is nearly glabrous. Males are nearly uniformly black, except for a red stain on the pronotum. Females are reddish to yellowish-brown
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