; Abh. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. 2: 675 (1837)
Distribution: SW-South America. The surrounding genera are often included. Echinopsis suffered from very severe oversplitting.
= Andenea Kreuz.; Verzeichnis Amer. Sukk. Rev. Syst. Kakteen 34 (1835)
= Aureilobivia Fric ex Kreuz.; Verzeichnis Amer. Sukk. Rev. Syst. Kakteen 33 (1935), nom. inval.
= Cosmantha Y.Itô; Hana Shaboten Zufu 148 (1967)
= Denmoza Britton & Rose; Cactaceae [Britton & Rose] 3: 78 (1922)
= Echinonyctanthus Lem.; Cact. Gen. Sp. Nov. 10 (1839)
= Hymenorebutia Fric ex Buining; Succulenta (Netherlands) 21: 101 (1939)
= Pilopsis Y.Itô; Bull. Takarazuka Insectarium 71: 17 (1950), nom. inval.
= Salpingolobivia Y.Itô; Expl. Diagr. Austroechinocact. 290 (1957)
= xCosmopsis Y.Itô; J. Cact. Succ. Soc. Japan 94: 23 (1977)
= xEchinostele M.H.J.van der Meer; Cact. Phantast. 2021(1)-1: 1 (2021)
= xLeia M.H.J.van der Meer; Cact. Phantast. 2022(2)-1: 2 (2022)
= xSalpingolobiviopsis Y.Itô; Hana Shaboten Zufu 48 (1967)