Genus: Rhacocassis Spaeth, 1904
Rhacocassis Spaeth, 1904: 76 (type species: Coptocycla flavoplagiata Baly, 1863, by monotypy), 1914 g: 129; Hincks, 1952: 340; Seeno and Wilcox, 1982: 178; Borowiec, 1987 c: 454, 1999 d: 315.
Thlaspidomorpha Spaeth, 1914 d: 563 (type species: Coptocycla balyi Boheman, 1855, by monotypy), 1914 g: 128; Hincks, 1952: 340; Seeno and Wilcox, 1982: 178; Borowiec, 1987: 454 (as syn. of Rhacocassis Spaeth, 1904).
Species (2, species with colour photos marked with an asterisk):