dueterostomia

6 classes of echinodermata

asteroidea, ophiuroidea, echinoidea, holothuroidea, crinoidea, concentricycloidea

asteroidea

sea stars, star fish; 5/multiples of 5 arms; tube feet and ambulacal groove; pedicellariae

ophiuroidea

brittle stars, serpent stars, basket stars; central disc, long slender arms, closed ambularcral groove

echinoidea

urchins, sand dollars, and sand biscuits; dermal ossicles fused; pedicellariae

holothuroidea

sea cucumber, sea apples; eviceration for defense, extended oral/aboral axis; feed with tentecles

crinoidea

sea lillies, sea feathers; arms with pinnicles; filter feeders

concentricycloidea

sea daisies; deep ocea, no arms, tube feet

urochordata

invertebrate; incurrent/excurrent siphon; pharynx w/ gill slits; atrium, tunic, coelom

cephalochordata

mouth, pharynx, atrium, siphon, anus, post anal tail, notochord and nerve cord

vertebrate classes

chonrichthyes, osteichthyes, amphibia, reptilia, aves, mammalia

chondrichthyes

sharks and rays

osteichthyes

bony fish; lung fih; ray finned fish

amphibia orders

anura (frogs), caudata (salamanders), gymnophonia

reptilia orders

testudines (turtles), squamata ( snakes/lizards), sphenodonta (tautara), crocodilia (alligators, cros, caimans)