Trochalus guineensisTrochalus guineensis is a species of beetle of the family Scarabaeidae. It is found in Guinea-Bissau.DescriptionAdults reach a length of about 6-7 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.