Trochalus guineensis is a species of beetle of the family Scarabaeidae. It is found in Guinea-Bissau.
Adults reach a length of about 6âÂÂ7 mm. The upper surface is blackish-brown, dull and tomentose, while the head is shiny. The underside is somewhat lighter. The pronotum and elytra are densely and rather finely punctured, the latter with faint striae.