Pachystylus may refer to:Pachystylus (beetle), a genus of beetles in the family Curculionidae Pachystylus (plant), a genus of plants in the family Rubiaceae Pachystylus, a genus of beetles in the family Chrysomelidae, synonym of Pachybrachis Pachystylus, a fossil genus of gastropods in the family Cryptaulacidae, synonym of Laevibaculus