animal phyla comparison

bio 2

porifera

sponges; no germ layers; no body cavity; no symmetry; no digestive system

cnidaria

hydra, jellyfish, anemones, corals; 2 germ layers; acoelomate; radial symmetry; gastrovascular cavity

ctenophora

comb jellies; 3 germ layers; acoelomate; biradial symmetry; complete digestive system

platyelminthes

flatworms (planarians, tapeworms, flukes); 3 germ layers; acoelomate; bilateral symmetry; gastrovascular cavity (tapeworms lack digestive system)

nematoda

roundworms ( ascaris, trichinella, dirofilaria); 3 germ layers; pseudocoelom; bilateral symmetry; complete digestive system

brachiopoda

lamp shells; 3 germ layers; coelomate; bilateral symmetry; complete u shaped digestive system with lophophore

mollusca

clams, snails, octopuses; 3 germ layers; coelomate; bilateral symmetry; complete digestive system

annelida

segmented worms ( earthworms, leeches); 3 germ layers; coelomate; bilateral symmetry; complete digestive system

arthropoda

horseshoe crabs, tarantulas, crustaceans, insectes, myriapods; 3 germ layers; coelomate; bilateral symmetry; complete digestive system

echinodermata

sand dollars, sea cucumbers, sea urchins, sea stars; 3 germ layers; coelomate; larva with bilaterral symmetry, adults with pentaradial symmetry; complete digestive system

chordata

lamprey, hagfish, sharks, bony fish, amphibians, reptiles, birds, mammals'; 3 germ layers; coelomate; bilateral symmetry; complete digestive system