1. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:

2. - Multicellular , heterotrophic eukaryotes that lack a cell wall
IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
- Multicellular , heterotrophic eukaryotes that lack a cell wall
- Choanoflagellate ancestry
- Oldest animal fossils date to 650 mya
August 2010: Princeton geoscientist Adam Maloof describes possible sponge fossil dating to 650 mya, found in Australia.

3. - Multicellular , heterotrophic eukaryotes that lack a cell wall
IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
- Multicellular , heterotrophic eukaryotes that lack a cell wall
- Choanoflagellate ancestry
- Oldest animal fossils date to 650 mya
- Major radiation of phyla 550 mya – Cambrian ‘Explosion’
evolution of predatory Cnidarians selected for evolution of hard parts
that fossilize more readily.

4. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
32 Animal Phyla: 95% of species are ‘invertebrates’ (85% are Arthropods);
most are marine

5. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
32 Animal Phyla

6. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
32 Animal Phyla

7. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
32 Animal Phyla

8. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
2. Development:

9. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
2. Development:
3. Body Plans:

10. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
2. Development:
3. Body Plans:
4. Phylogeny:

11. IV. The Domain Eukarya
E. Fungi
F. Animals
1. Overview:
2. Development:
3. Body Plans:
4. Phylogeny:
5. Major “Invertebrate” Phyla
a. Porifera: Sponges
Intracellular digestion
Cellular ‘circulatory’ system
Asymmetrical
Cells loosely integrated

12. 5. Major “Invertebrate” Phyla
a. Porifera: Sponges
b. Cnidaria: Corals, Hydra, Anemones, Jellyfish

13. 5. Major “Invertebrate” Phyla
a. Porifera: Sponges
b. Cnidaria: Corals, Hydra, Anemones, Jellyfish
Two true tissue layers
(diploblastic)
Predatory
(cnidocytes /nematocysts)
Intra- and extracellular
Digestion
Amebocytes in mesoglea
(‘circulatory system’)
Radial Symmetry
Medusa
Polyp

14. “Bilateria” – bilateral symmetry cephalization: getting a head
5. Major “Invertebrate” Phyla
a. Porifera: Sponges
b. Cnidaria: Corals, Hydra, Anemones, Jellyfish
“Bilateria” – bilateral symmetry
cephalization: getting a head

15. Protostomes - Lophotrochozoans
5. Major “Invertebrate” Phyla
a. Porifera: Sponges
b. Cnidaria: Corals, Hydra, Anemones, Jellyfish
Protostomes - Lophotrochozoans

16. Protostomes - Lophotrochozoans
5. Major “Invertebrate” Phyla
a. Porifera: Sponges
b. Cnidaria: Corals, Hydra, Anemones, Jellyfish
Protostomes - Lophotrochozoans