Cladogram of Animals

Phylum PoriferaSponges – the simplest animal

Porifera

• most ancient group of animals (500 mya)• multicellular• heterotrophic• a few specialized cells• asymmetrical• invertebrate

Porifera

• means “pore bearers” since they have tiny openings all over body

• filter feeder - eat tiny, floating organic particles and plankton

• food and oxygen in, waste out• sessile - live permanently attached to a

location in the water

Phylum CnidariaJellyfish, sea fans, sea anemones, hydras, & corals

Lions mane jellyfish - grows up

to 8ft acrossthe tentacles can be over 100ft long

Cnidaria• aquatic organisms• radial symmetry• invertebrate• central mouth• coral polyps build calcium

carbonate structures coral reefs

• stinging cells (nematocysts) are arranged on tentacles and used to capture food (small planktonic animals)

Cnidaria• some individual, some colonial

Use Ch 26 and write the correct phylum and symmetry.

Use Ch 26 and match the correct phylum, picture and description.