Arachnids (Arachnida) is a biological class of the kingdom Animalia and phylum Arthropoda.
Opiliones
Holothyrida
Ixodida
Mesostigmata
Palpigradi
Opilioacarida
Pseudoscorpiones
Ricinulei
Sarcoptiformes
Scorpiones
Schizomida
Araneae
Solifugae
Trombidiformes
Uropygi
Amblypygi
Arachnida
Branchiopoda
Chilopoda
Cephalocarida
Collembola
Diplura
Insecta
Malacostraca
Maxillopoda
Diplopoda
Ostracoda
Pauropoda
Protura
Symphyla
Remipedia
Pycnogonida