1. Animal Diversity 3 Deuterostomes: Echinodermata and Chordata

4. Echinodermata & Chordata

5. Echinodermata “Spiny skin” Endoskeleton of spiny plates Marine animals (no freshwater or terrestrial species) Adults = radial; larvae = bilateral Water vascular system (used for feeding, gas exchange, and locomotion) Canals end in “tube feet”; opening = madreporite

7. Bilateral Larva

8. Chordata Pharyngeal slits/pouches Dorsal nerve cord Notochord Post-anal tail

9. Pharyngeal slits

10. Dorsal (hollow) nerve cord Nerve cord Notochord

11. (versus solid, ventral nerve cord)

12. Notochord Nerve cord Notochord Flexible rod that supports the nerve cord (becomes intervertebral discs in between vertebrae in humans.)

13. Post anal tail

14. (body extends past the anus...)

15. Chordata Pharyngeal slits/pouches Dorsal nerve cord Notochord Post-anal tail

16. Subphyla Tunicata (once called Urochordata) Craniata Cephalochordata

17. Example: lancelets

18. Tunicata

19. Craniata (Vertebrata)

20. Specimens today Lancelet (one per table) Lamprey Sea cucumber Sea Urchin Sea Star