Pachystylus

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