Pachyserica rubrobasalis is a species of beetle of the family Scarabaeidae. It is found in China (Fujian, Guangdong, Guangxi, Hunan, Jiangxi, Zhejiang).
Adults reach a length of about 11.3 mm. They have a dark brown, elongate-oval body, with a greenish sheen. The antennae are yellowish-brown, the surface entirely matte tomentose except for the shiny labroclypeus. The dorsum has numerous white scale-like hairs, while the pronotum and elytra are without erect setae.