organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
         Phylum Mollusca Linnaeus, 1758 - molluscs
           01 Class Aplacophora von Ihering, 1876 - aplacophorans see Phylum Mollusca Linnaeus, 1758
           02 Class Polyplacophora Blainville, 1816 - chitons
           03 Class †Calyptoptomatida Fisher, 1962
           04 Class †Cricoconarida Fisher, 1962
           05 Class †Mattheva Yochelson, 1966 see Class Polyplacophora Blainville, 1816
           06 Class Monoplacophora Odhner, 1940 - monoplacophorans
           07 Class †Rostroconchia Pojeta et al., 1972
           08 Class Scaphopoda Bronn, 1862 - tusk shells
           09 Class Bivalvia Linnaeus, 1758 - bivalves
           10 Class Gastropoda Cuvier, 1795 - snails and slugs
           11 Class Cephalopoda Cuvier, 1795 - cephalopods