Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795 Order Mesogastropoda Thiele, 1925 - mesogastropods see [unranked] mesogastropods Superfamily Rissoacea Gray, 1847 see Superfamily Rissooidea Gray, 1847 Family Rissoinidae Stimpson, 1865 see Subfamily Rissoininae Stimpson, 1865 1 Genus Rissoina d'Orbigny, 1840