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

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

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

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

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