Phyla

Inverts

Porifera

No symmetry. No true tissue.

Demospongia

Leuconoid. 2 and 3 point spicule. SiO₂ and spongin

Cnideria

Diploblasts. Radial Symmetry. Nomatocysts. Hydrostatic.

Scyphozoa

“true jellies”. Lack velum. Mouth surrounded by oral arms. Nomatocysts. Polyp=juvenile. Medusa=adult.

Hydrozoa

has velum. Specialization of juvenile polyps. hydromedusa=main.

Anthozoa

polyp. thick mesoglea/mesochyn.

Octocorallia

8 septa. Soft corals.

Hexacorallia

6 septa. Hard corals. Symbiotic zooxanthellae.

Cubozoa

box jellies. Have velum. thick mesoglea.

Ecdysozoa

Molters. Exoskeleton (jointed). no cilia. triploblastic.

Arthropoda.

force generation

Crustacean

5,8,6. carapace. nauplius larvae.

Malacostraca

fused head and thorax. branched pleopods.

Decapods.

10 thorasic legs, first thorasic claw. complete carapace.

isopoda

dorsal ventral compression. no carapace.

amphipoda.

lateral compression.

stomatopoda

2nd thorasic becomes claw.

cirripedia.

barnacles. modified arms to deposit feed

Lophotrochozoa

everything else. triploblastic. protosome

platyhelminthes

antherior posterior axis. cephelization. acoelomates. hydrostatic.

turbellaria

free living.

annelida

chitenous state. segmented. modular growth. coelum. closed circulation.

polychaeta

tentacles= deposit. feathers = suspension feeders.

Mollusca

radula. mantel tissue. pallial groove. shells=CaCO₃

Gastropods

torsion. operculum. velinger stage.

Bivalve.

2 big shells.

Cephlapod.

Reduced shell. closed circulatory system. Siphon.