protosomes
by Teri Lynn Lewis
1. lophotrochozoans
1.1. flatworms
1.1.1. planaria
1.1.2. tapeworms
1.2. annelids
1.2.1. earthworms
1.2.2. leeches
1.3. molluscs
1.3.1. bivalves
1.3.1.1. oysters
1.3.1.2. clams
1.3.2. gastropods
1.3.2.1. snails
1.3.3. cephalopods
1.3.3.1. octopus
1.3.3.2. squid
2. ecdysozoans (molting)
2.1. roundworms
2.1.1. nematods
2.2. arthopods
2.2.1. chelicerates
2.2.1.1. scorpions
2.2.1.2. ticks
2.2.1.3. spiders
2.2.1.4. mites
2.2.1.5. horseshoe crabs
2.2.2. myriapods
2.2.2.1. centipedes
2.2.2.2. millipedes
2.2.3. crustaceans
2.2.3.1. isopods
2.2.3.2. decapods
2.2.3.2.1. shrimp
2.2.3.2.2. crab
2.2.3.2.3. lobsters
2.2.3.2.4. crawfish
2.2.3.3. barnacles
2.2.4. hexapods (insects, 6 legs, 3 body parts)
2.2.4.1. odonates
2.2.4.1.1. dragonflies
2.2.4.2. coleopterans
2.2.4.2.1. beetles
2.2.4.3. hymenopterans
2.2.4.3.1. bees
2.2.4.3.2. wasps
2.2.4.3.3. ants
2.2.4.4. dipterans
2.2.4.4.1. flies
2.2.4.4.2. mosquitoes
2.2.4.5. lepidopterans
2.2.4.5.1. butterflies
2.2.4.5.2. moths
2.2.4.6. orthopterans
2.2.4.6.1. grasshoppers
2.2.4.6.2. crickets
2.2.4.7. hemipterans
2.2.4.7.1. fleas
2.2.4.7.2. lice
2.2.4.7.3. termites
3. deuterosomes
3.1. echinoderms
3.1.1. sea stars
3.1.2. sea urchins
3.1.3. sand dollars
3.2. chordates
3.2.1. cephalochordates
3.2.1.1. tunicates
3.2.1.2. lancelets
3.2.2. vertebrates
3.2.2.1. fish
3.2.2.1.1. jawless
3.2.2.1.2. gnathostomes
3.2.2.1.3. chondrichthytes
3.2.2.1.4. osteichthyes
3.2.2.1.5. tetrapods
3.2.2.2. amphibians
3.2.2.2.1. frogs
3.2.2.2.2. salamanders
3.2.2.3. reptiles
3.2.2.3.1. snakes
3.2.2.3.2. lizards
3.2.2.3.3. turtles
3.2.2.3.4. alligators
3.2.2.4. mammals
3.2.2.4.1. produce milk
3.2.2.4.2. have hair
3.2.2.4.3. monotremes(lay eggs)
3.2.2.4.4. marsupial
3.2.2.4.5. placental