Phanaeus triangularis, the black phanaeus, is a North American species of true dung beetle in the family Scarabaeidae. It is found in the eastern half of the United States.
Subspecies Three subspecies of Phanaeus triangularis are sometimes recognized, but niger is often considered a synonym of triangularis and texensis (from Texas and adjacent regions) is often considered a separate species.
Phanaeus triangularis niger Olsoufieff, 1924 Phanaeus triangularis texensis Edmonds, 1994 Phanaeus triangularis triangularis (Say, 1823)
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