1. Animal Phyla

2. Phylum Body plan (symmetry, systems present)
Distinguishing Characteristics/Adaptations
Examples (2-3 marine organisms)

3. Body symmetry

4. Porifera Symmetry? Contain pores used to filter feed Sponges
Stove Pipe Sponge
Branching tube sponge
Vase Sponges
Rope Sponges

5. Cnidaria
Symmetry?
Soft bodied organisms containing stinging cells (nematocysts)
Either consist of a medusa and tentacles or a polyp with tentacles 5

6. Platyhelminthes Symmetry? Flat-bodied worms without segments
Contain only a gut, one pharyngeal opening and a nervous system
Respirate by diffusion
flatworms; tapeworms, flukes (often parasitic)

7. Nemertea Symmetry? Ribbon worms
Segmented with a proboscis and complete gut (with anus)
Carnivores of annelids, clams, crustaceans
Can have symbiotic relationship with some molluscs (Malacobdella)
Basiodiscus mexicanus - banded nemertean worm

8. Nematoda Roundworms (cylinder body) Symmetry? Complete gut
Carnivorous, small parasitic worms
Robbea and Astomonema

9. Annelida
Segmented worms with nervous, circulatory and digestive systems (more complex than playhelminthes)
Well adapted to live in many habitats
Feather duster worms, bristle worms, tube worms, & leeches
Christmas tree worm
Bearded fireworm

10. Mollusca Soft-bodies organisms with a head region and a muscular foot
Many have external shells
Snails, slugs squids, octopus, clams, oysters, scallop, mussel

11. Mollusca continued

12. Lophophorates Group of invertebrates with lophophore
Ciliated, hollow tentacles used to collect suspended food (usually phytoplankton)
Three phyla in this group – Bryozoa, Brachipoda and Phoronida.

13. Bryozoa “Moss animals” Grow in colonies on hard substrates
Often divide roles among the zooids (individual)
Have a specialized digestive, nervous and reproductive system (lacking specialized excretory or respiratory)
Often mistaken for coral
Cristatella mucedo, Lophopodella carteri

14. Echinodermata Echinoderm means “spiny skin” Only found in ocean
Uses a water vascular system and tube feet for circulation and movement
Sea stars, sea cucumbers, sea urchin, brittle stars, crinoids (sea lillies)

15. Arthropoda
Organisms with segmented bodies, exoskeletons made of chiton and compound eyes
Largest phyla
crabs, lobsters, hermit crab, shrimp, sea spiders, horseshoe crab

16. Chordata Animals with vertebrae Tend to be larger
Fully developed digestive, circulatory, excretory and respiratory systems
Includes: iguanas, birds, turtles, whales, dolphins, sharks, seals, fish, otters 16