PHYLUM ARTHROPODA

Subphylum Trilobitomorpha

Class Trilobita - Trilobites

Subphylum Chelicerata

Class Merostomata - horseshoe crabs

Class Pycnogonida (or Pantopoda) - sea spiders

Class Arachnida - scorpions, spiders, daddy longlegs, mites, ticks

Subphylum Crustacea

Class Branchiopoda - brine shrimp & water fleas

Class Ostracoda - ostracods

Class Maxillopoda - copepods & barnacles

Class Malacostraca

Order Isopoda - isopods

Order Euphausiacea - krill

Order Stomatopoda - stomatopods

Order Decapoda - crabs, lobsters, shrimp, crayfish

Subphylum Uniramia

Class Insecta - insects

Order Hemiptera - true bugs, water boatmen

Order Homoptera - cicadas, aphids, leafhoppers

Order Diptera - true flies, gnats, flies, mosquitoes, no-see-ums

Order Siphonaptera - fleas

Order Trichoptera - caddisflies

Order Lepidoptera - moths, butterflies

Order Hymenoptera - ants, bees, wasps

Order Coleoptera - beetles

Order Orthoptera - crickets, grasshoppers

Order Odonata - damselflies, dragonflies

Order Plecoptera - stoneflies

Order Ephemeroptera - mayflies

Order Isoptera - termites

Order Neuroptera - dobson flies, lacewings, ant lions

Order Dermaptera - earwigs

Order Thysanura - silverfish

Order Mecoptera - scorpion flies

Class Chilopoda - centipedes

Class Diplopoda - millipedes