†SUBFAMILY BATHYLASMATINAE NEWMAN & ROSS, 1971 (PALAEOCENE–RECENT)

† Bathylasma Newman & Ross, 1971 (Palaeocene– Recent) (one species)

† Mesolasma Foster, 1981 (Oligocene–Recent) (one species)

†† Tessarelasma Withers, 1936 (Miocene) (two species)

Tetrachaelasama Newman & Ross, 1971 (two species)