Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Onychophora Grube, 1853 - velvet worms
     1 Family Peripatidae Evans, 1901
     2 Family Peripatopsidae Bouvier, 1907
     3 Family †Succinipatopsidae Poinar, 2000
     4 Family †Tertiapatidae Poinar, 2000
     5 Family †Helenodoridae Poinar, 2000