Bequania Brown, 1844 ex Leach ms.
Cryptodon Turton, 1822
Crypton Verrill, 1880
Ptychina Philippi, 1836
Parathyasira Iredale, 1930
Leptaxinus Verrill & Bush, 1898
Clausina Jeffreys, 1847 non Bronn, 1827
Axinulus Verrill & Bush, 1898
Mendicula Iredale, 1924