Stylommatophora
Coarctatio Haas, 1945
Egestula Iredale, 1915
Helicodiscus E. S. Morse, 1864
Lucilla Lowe, 1852
Polygyriscus Pilsbry, 1948
Stenopylis Fulton, 1914
Zilchogyra Weyrauch, 1965
