Between brackets is the number of accepted species

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- Mollusca (132 754)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 992)
- Class Caudofoveata (143)
- Class Cephalopoda (1 832)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 679)
- Subclass Amphigastropoda † (387)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 623)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 154)
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 914)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (511)
- Superfamily Eoacmaeoidea T. Nakano & Ozawa, 2007 accepted as Lottioidea Gray, 1840
- Superfamily Lottioidea Gray, 1840 (334)
- Family Acmaeidae Forbes, 1850 (22)
- Family Bertiniidae Jousseaume, 1883 accepted as Nacellidae Thiele, 1891
- Family Damilinidae Horný, 1961 † (14)
- Family Eoacmaeidae T. Nakano & Ozawa, 2007 (15)
- Family Erginidae A. V. Chernyshev, 2018 accepted as Rhodopetalidae Lindberg, 1981
- Family Lepetidae Gray, 1850 (24)
- Family Lepetopsidae J. H. McLean, 1990 † (11)
- Family Lottidae [sic] accepted as Lottiidae Gray, 1840
- Family Lottiidae Gray, 1840 (191)
- Subfamily Lottiinae Gray, 1840 (142)
- Subfamily Patelloidinae Chapman & Gabriel, 1923 accepted as Patelloidini Chapman & Gabriel, 1923
- Subfamily Tecturinae J. E. Gray, 1847 (14)
- Genus Flexitectura O. Anistratenko, 2000 † (2)
- Genus Tectura J. E. Gray, 1847 (12)
- Subgenus Tectura (Flexitectura) O. Anistratenko, 2000 † accepted as Flexitectura O. Anistratenko, 2000 †
- Subgenus Tectura (Niveotectura) T. Habe, 1944 accepted as Niveotectura T. Habe, 1944
- Subgenus Tectura (Pilidium) Middendorff, 1851 accepted as Piliscus Lovén, 1859
- Species Tectura adunca Jeffreys, 1883
- Species Tectura alveus (Conrad, 1831) accepted as Lottia alveus (Conrad, 1831)
- Species Tectura antillarum (G. B. Sowerby I, 1834) accepted as Lottia antillarum G. B. Sowerby I, 1834
- Species Tectura concinna (Lischke, 1870) accepted as Nipponacmea concinna (Lischke, 1870)
- Species Tectura conoidalis Pease, 1868 accepted as Eoacmaea conoidalis (Pease, 1868)
- Species Tectura coppingeri E. A. Smith, 1881 accepted as Iothia emarginuloides (R. A. Philippi, 1868)
- Species Tectura depicta (Hinds, 1842)
- Species Tectura digitalis (Rathke, 1833) accepted as Lottia digitalis (Rathke, 1833)
- Species Tectura emydia (Dall, 1914) accepted as Lottia emydia (Dall, 1914)
- Species Tectura fenestrata (Reeve, 1855) accepted as Lottia fenestrata (Reeve, 1855)
- Species Tectura fluviatilis W. T. Blanford, 1867 accepted as Potamacmaea fluviatilis (W. T. Blanford, 1867)
- Species Tectura fulva (O. F. Müller, 1776) accepted as Iothia fulva (O. F. Müller, 1776)
- Species Tectura galeola Jeffreys, 1883
- Species Tectura iguypis Simone, 2024
- Species Tectura incognita Friedberg, 1928 †
- Species Tectura laevigata (Eichwald, 1850) †
- Species Tectura ornata G. Seguenza, 1876 † accepted as Iothia fulva (O. F. Müller, 1776)
- Species Tectura paleacea (A. Gould, 1853)
- Species Tectura patina (Rathke, 1833) accepted as Collisella patina (Rathke, 1833)
- Species Tectura persona (Rathke, 1833) accepted as Lottia persona (Rathke, 1833)
- Species Tectura pumila (Lindberg & J. H. McLean, 1981)
- Species Tectura pusilla Jeffreys, 1883
- Species Tectura radiata Pease, 1861 accepted as Williamia radiata (Pease, 1861)
- Species Tectura reticulata G. Seguenza, 1876 † accepted as Veleropilina reticulata (G. Seguenza, 1876)
- Species Tectura rosacea (P. P. Carpenter, 1864)
- Species Tectura rubroradiata Chirli & Forli, 2017 †
- Species Tectura rugosa Jeffreys, 1883 accepted as Iothia fulva (O. F. Müller, 1776)
- Species Tectura schrenckii (Lischke, 1868) accepted as Nipponacmea schrenckii (Lischke, 1868)
- Species Tectura scutum (Rathke, 1833) accepted as Lottia scutum (Rathke, 1833)
- Species Tectura tahitensis Pease, 1868 accepted as Cellana taitensis (Röding, 1798)
- Species Tectura taurinensis Sacco, 1897 †
- Species Tectura tenera (C. B. Adams, 1845)
- Species Tectura tessulata (O. F. Müller, 1776) accepted as Testudinalia testudinalis (O. F. Müller, 1776)
- Species Tectura testudinalis (O. F. Müller, 1776) accepted as Testudinalia testudinalis (O. F. Müller, 1776)
- Species Tectura ubiquita (Lindberg & J. H. McLean, 1981)
- Species Tectura unicolor (Forbes, 1844) accepted as Tectura virginea (O. F. Müller, 1776)
- Species Tectura virginea (O. F. Müller, 1776)
- Tribe Scurriini Lindberg, 1988 accepted as Lottiini Gray, 1840
- Genus Actinoleuca W. R. B. Oliver, 1926 (2)
- Genus Asteracmea W. R. B. Oliver, 1926 (10)
- Genus Atalacmea Iredale, 1915 (3)
- Genus Boreoblinia O. Anistratenko, Burger & V. Anistratenko, 2010 † (1)
- Genus Chiazacmea W. R. B. Oliver, 1926 accepted as Patelloida Quoy & Gaimard, 1834
- Genus Collisella Dall, 1871 accepted as Lottia J. E. Gray, 1833 (1)
- Genus Collisellacmaea Christiaens, 1975 accepted as Lottia J. E. Gray, 1833
- Genus Collisellina Dall, 1871 accepted as Patelloida Quoy & Gaimard, 1834
- Genus Conacmea W. R. B. Oliver, 1926 accepted as Notoacmea Iredale, 1915
- Genus Kikukozara Habe, 1944 accepted as Lottia J. E. Gray, 1833
- Genus Lecania P. P. Carpenter, 1866 accepted as Lottia J. E. Gray, 1833
- Genus Nipponacmaea [sic] accepted as Nipponacmea Sasaki & Okutani, 1993
- Genus Nipponacmea Sasaki & Okutani, 1993 (11)
- Genus Niveotectura T. Habe, 1944 (2)
- Genus Nomaeopelta S. S. Berry, 1958 accepted as Lottia J. E. Gray, 1833
- Genus Parvacmea Iredale, 1915 accepted as Notoacmea Iredale, 1915
- Genus Patelloidea [sic] accepted as Patelloida Quoy & Gaimard, 1834
- Genus Patelloides [sic] accepted as Patelloida Quoy & Gaimard, 1834
- Genus Potamacmaea Peile, 1922 (1)
- Genus Radiacmea Iredale, 1915 (2)
- Genus Subacmea W. R. B. Oliver, 1926 accepted as Notoacmea Iredale, 1915
- Genus Tecturella P. P. Carpenter, 1860 accepted as Lottia J. E. Gray, 1833
- Genus Tecturina P. P. Carpenter, 1861 accepted as Lottia J. E. Gray, 1833
- Genus Testudinalia Moskalev, 1966 (1)
- Genus Thalassacmea W. R. B. Oliver, 1926 accepted as Notoacmea Iredale, 1915
- Genus Yayoiacmaea [sic] accepted as Yayoiacmea Sasaki & Okutani, 1993
- Genus Yayoiacmea Sasaki & Okutani, 1993 (1)
- Family Neolepetopsidae J. H. McLean, 1990 (18)
- Family Patelloididae Chapman & Gabriel, 1923 accepted as Patelloidini Chapman & Gabriel, 1923
- Family Pectinodontidae Pilsbry, 1891 (32)
- Family Propilidiidae accepted as Lepetidae Gray, 1850
- Family Rhodopetalidae Lindberg, 1981 (7)
- Family Tecturidae J. E. Gray, 1847 accepted as Tecturinae J. E. Gray, 1847
- Superfamily Nacelloidea Thiele, 1891 accepted as Patelloidea Rafinesque, 1815
- Superfamily Neolepetopsoidea J. H. McLean, 1990 accepted as Lottioidea Gray, 1840
- Superfamily Patelloidea Rafinesque, 1815 (177)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 782)
- Class Lamellibranchiata accepted as Bivalvia
- Class Loricata accepted as Polyplacophora
- Class Mollusca incertae sedis † (372)
- Class Monoplacophora (229)
- Class Pelecypoda accepted as Bivalvia
- Class Polyplacophora (1 377)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (752)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata