animal phylogeny

metazoa

blastula, multicellularity, collagen & proteoglycans, unique cell-cell junctions

porifera

spicules

spicules

needle like structures

ctenophora

complete (one way gut)

placozoa

just have blastula, multicellularity, collagen & proteoglycans, unique cell-cell junctions

cnidaria

cnidocytes, planula larva, radial symmetry, incomplete gut

bilateria

bilateral symmetry, triploblasty, complete gut

protostomes

blastopore becomes mouth

lophotrochozoa

trochophore larva, spiral mosaic cleavage

ecdysozoa

ecdysis

mollusca

mantle&shell, radula

radula

a toothed, chitinous ribbon used by mollusks for feeding.

annelida

paired setae, segmentation

paired setae

bristle-like structures that appear in pairs

anthropoda

exoskeleton, segmentation

deuterostomes

blastopore becomes anus, radial cleavage

echinoderm

calcite exoskeleton, water vascular system, tube feet, pentaradial symmetry

chordata

postanal tail, notochord, dorsal hollow nerve chord, segmentation