Tamnoserica lucidula is a species of beetle of the family Scarabaeidae. It is found in Madagascar.
Adults reach a length of about 3.5 mm. They are very similar to Tamnoserica mutans. They are reddish-cuprous and shiny, with a punctate head and red antennae with a black club. The pronotum is broad, punctate, smooth and shiny. The elytra are punctately sulcate, with smooth interstices.