organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom [Animalia] Linnaeus, 1758 - animals
     Phylum †Vetulicolia Shu, Conway Morris, Han, Chen, Zhang, Zhang, Liu, Li & Liu, 2001
       Genus †Xidazoon Shu, Conway Morris, Zhang, Chen, Li & Han, 1999
         †Xidazoon stephanus Shu, Conway Morris & Zhang, in Shu et al., 1999