Between brackets is the number of accepted species

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- Mollusca (132 476)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (24 901)
- Class Caudofoveata (143)
- Class Cephalopoda (1 810)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 514)
- Class Lamellibranchiata accepted as Bivalvia
- Class Loricata accepted as Polyplacophora
- Class Mollusca incertae sedis † (372)
- Superfamily Macluritoidea P. P. Carpenter, 1861 † (15)
- Family Macluritidae P. P. Carpenter, 1861 † (15)
- Genus Barnesella Bridge & Cloud, 1947 † (2)
- Species Barnesella lecanospiroides Bridge & Cloud, 1947 †
- Species Barnesella measuresae Rohr, 1994 †
- Genus Maclurea Emmons, 1842 † accepted as Maclurites Lesueur, 1818 †
- Genus Maclurina Ulrich & Scofield, 1897 † (2)
- Genus Macluritella E. Kirk, 1927 † (2)
- Genus Maclurites Lesueur, 1818 † (2)
- Genus Mitrospira E. Kirk, 1930 † accepted as Palliseria A. E. Wilson, 1924 †
- Genus Monitorella Rohr, 1994 † (1)
- Genus Palliseria A. E. Wilson, 1924 † (1)
- Genus Rousseauspira Rohr & Potter, 1987 † (1)
- Genus Teiichispira Yochelson & C. R. Jones, 1968 † (3)
- Genus Zhuozishanospira W. Yu, 1961 † (1)
- Superfamily Pelagielloidea Knight, 1956 † (17)
- Superfamily Scenelloidea S. A. Miller, 1889 † (185)
- Superfamily Yochelcionelloidea Runnegar & Jell, 1976 † (81)
- Family Khairkhaniidae Missarzhevsky, 1989 † (14)
- Family Ladamarekiidae Frýda, 1998 † (3)
- Family Maikhanellidae Missarzhevsky, 1989 † (17)
- Family Metoptomatidae Wenz, 1938 † (22)
- Family Patelliconidae Frýda, 1998 † accepted as Protoconchoididae Geyer, 1994 †
- Family Protoconchoididae Geyer, 1994 † (11)
- Family Purellidae Vassiljeva, 1990 † accepted as Maikhanellidae Missarzhevsky, 1989 †
- Family Yunnanopleuridae Yu, 1987 † accepted as Maikhanellidae Missarzhevsky, 1989 †
- Genus Aremellia Webers, Pojeta & Yochelson, 1992 † (1)
- Genus Cliodita Quoy & Gaimard, 1825
- Genus Emo Sutton, Sigwart, Briggs, Gueriau, King, Da. J. Siveter & De. J. Siveter, 2025 † (1)
- Genus Erugoconus Peel & Kouchinsky, 2022 † (1)
- Genus Filurus De Kay, 1844
- Genus Lapworthella Cobbold, 1921 †
- Genus Lemintina Risso, 1826
- Genus Ocruranus Liu, 1979 † (1)
- Genus Punk Sutton, Sigwart, Briggs, Gueriau, King, Da. J. Siveter & De. J. Siveter, 2025 † (1)
- Genus Shishania G.X. Zhang, Parry, Vinther & X.Y. Ma, 2024 † (1)
- Genus Stenothecoides Resser, 1938 †
- Genus Stephaconus Z. Jiang, 1980 † accepted as Ocruranus Liu, 1979 †
- Genus Tavseniconus Peel & Kouchinsky, 2022 † (1)
- 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