is a biological class of the kingdom Animalia and phylum Arthropoda.
Amphipoda
Decapoda
Cumacea
Isopoda
Euphausiacea
Lophogastrida
Stomatopoda
Mysida
Tanaidacea
Arachnida
Branchiopoda
Chilopoda
Insecta
Diplopoda
Ostracoda
Pauropoda
Symphyla
Pycnogonida