Organisms are divided into phylum, order, family, genus and species.
Invertebrates are divided into crustaceans (shrimp, crab and Daphnia) in the class Arthropoda.
Arachnoidea (scorpion spider mite tick pi four-tone spider)
Polypodal animals (centipede, Ma Lu, shield, swimming 2 eyes)
Insects (locusts, ants, crickets, mosquitoes and butterflies)
Different classes in the same class