Lingulata
Acrothyra Matthew, 1901
Acrotreta Kutorga, 1848
Aktassia Popov, 1976
Amictocracens Henderson & MacKinnon, 1981
Amplitreta Robson & Pratt, 2007
Anabolotreta Rowell & Henderson, 1978
Anelotreta Pelman, 1986
Angulotreta Palmer, 1954
Aphelotreta Rowell, 1980
Apsotreta Palmer, 1954
Canthylotreta Rowell, 1966
Conotreta Walcott, 1890
Cyrtonotreta Holmer, 1989
Dactylotreta Rowell & Henderson, 1978
Dicondylotreta Mei, 1993
Ditreta Biernat, 1973
Eohadrotreta Li & Holmer, 2004
Eurytreta Rowell, 1966
Fascicoma Popov, 1980
Hadrotreta Rowell, 1966
Hansotreta
Hisingerella Henningsmoen, 1948
Homotreta Bell, 1941
Kostjubella Popov, Holmer & Gorjansky, 1996
Kotylotreta Koneva, 1990
Lensotreta
Linnarssonella Walcott, 1903
Linnarssonia Walcott, 1885
Longipegma Popov & Holmer, 1994
Luhotreta Mergl & Slehoferova, 1990
Neotreta Sobolev, 1976
Olentotreta Koneva, Popov & Ushatinskaya, 1990
Opisthotreta Palmer, 1954
Ottenbyella Popov & Holmer, 1994
Pegmatreta Bell, 1941
Phoenicitoechia Havlicek, 1960
Physotreta Rowell, 1966
Picnotreta Henderson & MacKinnon, 1981
Prototreta Bell, 1938
Quadrisonia Rowell & Henderson, 1978
Rhondellina Rowell, 1986
Satpakella Koneva, Popov & Ushatinskaya, 1990
Semitreta Biernat, 1973
Spondylotreta Cooper, 1956
Stilpnotreta Henderson & MacKinnon, 1981
Straelenia Maillieux, 1935
Treptotreta Henderson & MacKinnon, 1981
Vandalotreta Mergl, 1988
