Length: 12-20 mm
Many members of this genus are noteable for the prominent horn of the male.
The color of Phanaeus triangularis may be black or more coppery, with the black form apparently more common in the deep South. The pronotum has a distinctive shape, and the elytral striae are especially deep near the base of the elytra.
The beetle pictured here is a state record for West Virginia, and in fact appears to be the first record for this species north of North Carolina. The photo was made in Upshur County on 15 September 1988.
Insects of West Virginia