Ateson Metcalf, 1938 (original description)
Flataloides Metcalf, 1938 (original description)
Flatissa Metcalf, 1938 (original description)
Hystrichodesmus Loomis, 1938 (original description)
Kardopocephalus Metcalf, 1938 (original description)
Koloptera Metcalf, 1938 (original description)
Leiomodesmus Loomis, 1938 (original description)
Melicharoptera Metcalf, 1938 (original description)
Melormenis Metcalf, 1938 (original description)
Messoides Metcalf, 1938 (original description)
Muirilixius Metcalf, 1938 (original description)
Paradascalia Metcalf, 1938 (original description)
Platonax Metcalf, 1938 (original description)
Pseudoflatoides Metcalf, 1938 (original description)
Pseudomysidia Metcalf, 1938 (original description)
Pseudotangia Metcalf, 1938 (original description)
Rhotella Metcalf, 1938 (original description)
Tangiella Metcalf, 1938 (original description)
Thioniamorpha Metcalf, 1938 (original description)
Thioniella Metcalf, 1938 (original description)
Thionissa Metcalf, 1938 (original description)