Trochalus byrrhinus is a species of beetle of the family Scarabaeidae. It is found in the Democratic Republic of the Congo and South Africa (Mpumalanga, Limpopo).
Adults reach a length of about 7-7.5 mm. They are sub-spherical, short, and plainly convex in the anterior part of the elytra. They are dark bronze and opaque. The antennae are flavescent.