Plectris vonvolxemi is a species of beetle of the family Scarabaeidae. It is found in Brazil.
Adults reach a length of about 12 mm. They are reddish-brown, somewhat glossy and have an elongated shape. The clypeus has only a few short setae at the eye, while the back of the head has a row of appressed setae along the posterior margin. The pronotum and elytra are rather sparsely and irregularly covered with appressed pale setae.