Key to the species of Polytuberotum

1. Sculpture of elytra deep and extended over the entire surface; pronotal disc with five moderately raised protuberances; tibiae and antennomeres black; elytral suture without pubescence. Peru (Cusco) ................... Polytuberotum metachroma

– Sculpture of elytra moderately coarse and restricted to the anterior third; pronotal disc with four protuberances; tibiae and antennomeres III–XI orangish-brown; elytral suture with yellowish pubescence on the apical region. Peru (Cusco)........................................................................ .. Polytuberotum boteroi sp. nov. (Figs. 22–26)