Trachycystis
Trachycystis may mean:
- In the Regnum Animalia - Trachycystis Pilsbry, 1893 (Gastropoda : Charopidae)
- In the Regnum Plantae - Trachycystis Lindb., 1868(Bryophyta : Mniaceae)
- Trachycystis Pascher, 1939 (Xanthophyta : Pleurochloridaceae) in the Regnum Chromista