Phylum Mollusca Linnaeus, 1758 - molluscs
Subphylum Conchifera Gegenbauer, 1878
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Eogastropoda Ponder & Lindberg, 1995
Order Patellogastropoda Lindberg, 1986
Suborder Nacellina Lindberg, 1988
see Superfamily Nacelloidea Thiele, 1891
Superfamily Acmaeoidea Carpenter, 1857
see Superfamily Lottioidea Gray, 1840
Family Acmaeidae Forbes, 1850 - American limpets
1 Subfamily Acmaeinae Forbes, 1850
2 Subfamily Pectinodontinae Pilsbry, 1891