Kingdom [Animalia] Linnaeus, 1758 - animals
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   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
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     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
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       Subdivision Bilateralia
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         Phylum Mollusca Linnaeus, 1758 - molluscs
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           Subphylum Aculifera Hatschek, 1891
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             Class Placophora von Ihering, 1876 see Class Polyplacophora Blainville, 1816
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               Order Ischnochitonina (Bergenhayn, 1930)
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                 1 Family Subterenochitonidae see Family Ischnochitonidae Dall, 1889
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                 2 Family Ischnochitonidae Dall, 1889
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                 3 Family Schizoplacidae Bergenhayn, 1955
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                 4 Family Chitonidae Rafinesque, 1815
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                 5 Family Callistoplacidae Pilsbry, 1893
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                 6 Family Schizochitonidae Dall, 1889
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                 7 Family Callochitonidae Plate, 1901
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                 8 Family Mopaliidae Dall, 1889
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                 9 Family Chaetopleuridae Plate, 1899
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