Kingdom Animalia Linnaeus, 1758 - animals
Phylum Mollusca Linnaeus, 1758 - molluscs
Subphylum Cyrtosoma Runnegar & Pojeta Jr., 1974
see Phylum Mollusca Linnaeus, 1758
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
Genus Littorina Férussac, 1822
Littorina saxatilis (Olivi, 1792) - rough periwinkle