| Clade | Pantetrapulmonata Shultz, 2007
| 14 53 171 | Families Genera Species |
| Order | Amblypygi Thorell, 1883 Amblypygids, Tail-less whip scorpions, Whip scorpions | 11 55 457 | Families Genera Species |
| Order | Araneae Clerck, 1757 Spider, Spiders, True Spiders | 242 6840 80976 | Families Genera Species |
| Order | Palpigradi Thorell, 1900 Micro-whip scorpions, Microscorpions, Microwhip scorpion | 5 11 153 | Families Genera Species |
| Order | Uropygi O. P-Cambridge, 1872 Uropygids, Vinegaroons, Whip scorpion, Whip scorpions | 10 125 842 | Families Genera Species |