Arachnids (Arachnida) is a biological class of the kingdom Animalia and phylum Arthropoda.
Opiliones
Palpigradi
Pseudoscorpiones
Ricinulei
Scorpiones
Schizomida
Araneae
Solifugae
Uropygi
Amblypygi
Arachnida
Branchiopoda
Chilopoda
Insecta
Diplopoda
Ostracoda
Pauropoda
Symphyla
Pycnogonida