Lasioserica petri is a species of beetle of the family Scarabaeidae. It is found in Vietnam.
Adults reach a length of about 6.5âÂÂ6.9 mm. They have a reddish brown, elongate-oval body. The dorsal surface is mostly dull with short, yellowish-white setae.
The species is named after its collector, Petr Pacholátko.