Classification of Animal Phyla

Porifera

ex: sponges

• asymmetrics and NO GERM LAYERS

• dead end phylum, doesn’'t give rise

Cnidaria (chi= di)

ex: jellyfish, starfish

• dipoblastic: ectoderm, endoderm

• Radial symmetry: many symmetrical lines

Phylum: Platyheminthes

ex: flat worms

• Triptoblastic (ectoderm, endoderm, mesoderm)

• Bilateral symmetry: right down middle

• Acelomate body cavity: no body cavity

Phylum: Annelida

ex: worms, leeches

• triptoblastic (ectoderm, endoderm, mesoderm)

• Bilateral symmetry: right down the middle

• EUCLEOMATES: has body cavity and internal lining

Phylum: molluca

ex: snails, clams, squid

Triptoblastic, bilateral symmetry and eucleomate,

• have shells

Phylum: Nemotoda

• ex roundworms

PSEUDOCLEOMATE: body cavity with no lining

• triptoblastic

• bilateral symmetry

Phylum: Anthropoda

ex: insects, beetles

• eucleomates

• triploblastic

• bilateral symmetry

• has a skeleton that allows them to move on land

Phylum: Echniodermata

ex: starfish

HAS DEUTEROSOME: anus

• triptobalstic

• bilateral symmetry

• eucleomates

Phylum cordata

ex: humans

• triptoblastic

• eucleomate

• bilateral symmetry

• HAS DEUTEROSOME

• gill slits and pouches