Pachybrachis nigricornis is a species of case-bearing leaf beetle in the family Chrysomelidae. It is found in Central America and North America.
Subspecies These four subspecies belong to the species Pachybrachis nigricornis: Pachybrachis nigricornis autolycus Fall, 1915 i c g b Pachybrachis nigricornis carbonarius Haldeman, 1849 i c g Pachybrachis nigricornis difficilis Fall, 1915 i c g b Pachybrachis nigricornis nigricornis (Say, 1824) i c g Data sources: i = ITIS, c = Catalogue of Life, g = GBIF, b = Bugguide.net
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