Non-bilaterian animals

Phylum Porifera common name

Sponges

Phylum Porifera tissue layers, symmetry, gut, cephilization

0 tissue, no symmetry, no gut, not cephalized

Phylum Porifera synapomorphies

Choaocytes w flagella and spicules

How do sponges eat?

Choanocyte flagella develop a water current and then food and water are filtered in though mesohyl into spongecoel and water exits through osculum

Phlyum Ctenophora common name

Comb jellies

Phlyum Ctenophora tissue layers, symmetry, gut, cephilization

Muscles and nerve cells, biradial symmetry, complete gut, not cephalized

Phlyum Ctenophora synapomorphies

Sticky colloblasts

How do ctenphores move?

Using cilia

How does prey capture differ from cnidarians

Sticky not stingy colloblasts

What are cnidocytes

Stingers

Phlyum Cnidaria tissue layers, symmetry, gut, cephilization

Diploblastic (ecto and endoderm), radial symmetry, two-way gut, nerve net, not cephilized

2 major body forms of cnidarians

Medusa (swimming) and polyp (sessile)

4 major classes

Anthoza, scyphozoa, cuboza, hydroza

Anthozoa

Coral/anemones: no medusa, break off and reform, photosynthesis

Scyphozoa

Jellyfish: reproduce via budding

Cuboza

Cube jellies: square medua, eyes, deadly stings

Hydroza

Diverse: survive in colony, less active, flow with current