Arca (Scapharca) Gray, 1847
Caloosarca Olsson, 1961
Cara Gray, 1857
Cunearca Dall, 1898
Diluvarca Woodring, 1925
Esmerarca Olsson, 1961
Imparilarca Iredale, 1929
Kikaiarca H. Noda, 1966
Potiarca Iredale, 1939
Rasia Gray, 1857
Scapharca Gray, 1847
Scapharca (Cunearca) Dall, 1898
Scapharcopsis F. Nordsieck, 1969
Sectiarca Olsson, 1961
Tosarca H. Noda, 1965