Alcidiella Cossmann, 1921 accepted as Alvania Risso, 1826 (original description)
Coelacanthis Cossmann, 1921 † (original description)
Colpostomia Cossmann, 1921 † (original description)
Covandria Cossmann, 1921 accepted as Eatonina Thiele, 1912 (original description)
Cyclodontostomia Cossmann, 1921 accepted as Cyclodostomia Sacco, 1892 accepted as Odostomia Fleming, 1813 (original description)
Digyridum Cossmann, 1921 † (original description)
Eglia Cossmann, 1921 † accepted as Egila Dall & Bartsch, 1904 (original description)
Faluniella Cossmann, 1921 † (original description)
Gibborissoa Cossmann, 1921 accepted as Gibborissoia Sacco, 1895 (original description)
Goniatogyra Cossmann, 1921 † (original description)
Littorinidea Cossmann, 1921 accepted as Littoridina Souleyet in Vaillant, 1852 (original description)
Loxotoma Cossmann, 1921 † accepted as Loxostoma Bivona-Bernardi, 1838 accepted as Rissoa Desmarest, 1814 (original description)
Macrodontostomia Cossmann, 1921 † accepted as Macrodostomia Sacco, 1892 † (original description)
Miraldiella Cossmann, 1921 † (original description)
Paludotrochus Cossmann, 1921 † (original description)
Paratinostoma Cossmann, 1921 † (original description)
Puposyrnola Cossmann, 1921 (original description)
Purgisculus Cossmann, 1921 † (original description)
Pyramistomia Cossmann, 1921 † (original description)
Pyrhostylus Cossmann, 1921 † (original description)
Sinustomia Cossmann, 1921 † (original description)
Speekia Cossmann, 1921 accepted as Spekia Bourguignat, 1879 (original description)
Stomatogyrus Cossmann, 1921 accepted as Somatogyrus Gill, 1863 (original description)
Stomatomega Cossmann, 1921 † (original description)
Taphrostomia Cossmann, 1921 † (original description)
Trachypyrgula Cossmann, 1921 † (original description)
Trochoturbella Cossmann, 1921 † (original description)