Porifera

Sponges

Cnidaria

HydraAnemonesJellyfish

Platyhelminthes

Flatworms

Nematoda

Roundworms

Annelida

Segmentedworms

Mollusca

SnailsClamsSquids

ArthropodaInsectsArachnicsCrustaceansMyriapods

EchinodermataSeastars,urchins,brittlestars,seacucumbers

ChordataVertebrates

Leveloforganization

Cellular.Lacktissues

Tissues,lackorgans

Organsystems Organsystems Organsystems Organsystems Organsystems Organsystems Organsystems

Germlayers Absent Two Three Three Three Three Three Three Three

Symmetry Absent Radial Bilateral Bilateral Bilateral Bilateral Bilateral Bilateral-larvaRadial-adult

Bilateral

Cephalization Absent Absent Present Present Present Present Present Absent Present

Bodycavity Absent Absent Absent Pseudocoelom Coelom Coelom Coelom Coelom Coelom

Segmentation Absent Absent Absent Absent Present Absent Present Absent Presentbutreduced

Habitat Marine,fewofthemfreshwaterspecies.Sessile.

Mostliveintheoceans.Polypsliveattached.

Aquatic,dampterrestrialplaces.Someparasites.

Allhabitatsaquaticandterrestrial,someofthemparasites

Sea,freshwater,dampsoils

Aquatic,terrestrialinsomeplaces

Allovertheplanet

Marineanimals Allovertheplanet

Feeding Filterfeeding Carnivorouspredators

Freelivingandparasites,detritivores,saprophages

Freelivingandparasites,detritivoressaprophages

Freelivingandparasites,detritivoressaprophages

Filterfeeding,othersherbivorous,othercarnivorouspredators

Herbivorous,othercarnivorouspredators,otherssaprophages

Herbivorous,othercarnivorouspredators

Herbivorous,carnivorouspredators,scavengers….

Body Spicules Stingingcellsgastrovascular

Flat Cylindrical Metamerssetae

VisceralmassmantleShellfoot

Cephalothorax,head,abdomen

Endoskeleton,calciumcarbonate