| Mollusca (Phylum) |
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| Gastropoda Cuvier, 1797 (Class) |
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| Aplysiomorpha (Order) |
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| Archaeogastropoda (Order) |
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| Drilliidae Olsson, 1964 (Family) |
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| Mesogastropoda (Order) |
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| Neogastropoda (Order) |
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| Notaspidea (Order) |
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| Pyrenoidea (Family) |
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| Sacoglossa (Order) |
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| Thecosomata (Order) |
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| Xanthonyx (Genus) |
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| Gastropoda Eogastropoda Ponder & Lindberg, 1996 (Subclass) |
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| Docoglossa Troschel, 1866 (Order) |
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| Gastropoda Orthogastropoda Ponder & Lindberg, 1996 (Subclass) |
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| Nudibranchia Bergh, 1891 (Order) |
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| Pleurobranchomorpha Schmekel, 1985 (Order) |
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| Pteropoda Cuvier, 1804 (Order) |
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| Rhodopemorpha Salvini Plawen, 1991 (Order) |
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| Gastropoda Orthogastropoda Allogastropoda Haszprunar, 1985 (Superorder) |
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| Allogastropoda Haszprunar, 1985 (Order) |
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| Gastropoda Orthogastropoda Caenogastropoda Cox, 1959 (Superorder) |
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| Architaenioglossa Haller, 1890 (Order) |
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| Sorbeoconcha Ponder & Lindberg, 1996 (Order) |
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| Gastropoda Orthogastropoda Cocculinida Dall, 1882 (Superorder) |
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| Cocculinida Dall, 1882 (Order) |
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| Gastropoda Orthogastropoda Neomphalida McLean, 1981 (Superorder) |
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| Neomphalida McLean, 1981 (Order) |
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| Gastropoda Orthogastropoda Neritaemorphi Koken, 1896 (Superorder) |
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| Neritopsina Gray, 1847 (Order) |
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| Gastropoda Orthogastropoda Opisthobranchia Milne Edwards, 1848 (Superorder) |
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| Acochlidea Odhner, 1939 (Order) |
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| Anaspidea P. Fischer, 1883 (Order) |
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| Architectibranchia (Order) |
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| Cephalaspidea P. Fischer, 1883 (Order) |
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| Umbraculomorpha Schmekel, 1985 (Order) |
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| Gastropoda Orthogastropoda Vetigastropoda Salvini-Plawen, 1980 (Superorder) |
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| Vetigastropoda Salwini-Plawen, 1980 (Order) |
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| Gastropoda Pulmonata (Subclass) |
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| Basommatophora (Order) |
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| Eupulmonata (Order) |
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| Stylommatophora (Order) |
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| Systellomatophora (Order) |
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