(but see text) Leanchoilia is a megacheiran arthropod known from Cambrian deposits of the Burgess Shale in Canada and the Chengjiang biota of China.Its internal organs are occasionally preserved within the substrate in three dimensions.[4][5] Seven species are tentatively accepted today: L. superlata (the type species), L. persephone and L. protogonia from the Burgess Shale, L. illecebrosa and L. obesa from the Chengjiang biota, ''L.L. superlata and L. persephone may however be examples of sexual dimorphism.[6][7][8] 55 specimens of Leanchoilia are known from the Greater Phyllopod bed, where they comprise 0.1% of the community.