Classroom presentation about a group of echinoderms called Asteroidea (starfish). There's additional material in a pdf file called "Slide notes Echinoderms - Asteroidea". There you'll find the links to the videos mentioned in the presentation.

1. 1
ASTEROIDEA
UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE
CLASS: ZOOLOGY II

2. INTRODUCTION
Asteroidea
Starfish
Invertebrates
 Echinoderms
 Deuterostomes
 Pentameric radial
symmetry
2
Asteroidea – Zoology II

3. PHYLOGENY– ECHINODERMATA INSIDE METAZOA
3
Asteroidea – Zoology II

4. EMERGING PATTERNS
 Catch connective tissue
 Niche sharing
4
Asteroidea – Zoology II

5. PHYLOGENY – ASTEROIDEA INSIDE ECHINODERMATA
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Asteroidea – Zoology II

6. ANATOMY – EXTERNAL
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 Size
 Between12 and 24 cm
in diameter
Asteroidea – Zoology II

7. ANATOMY – EXTERNAL
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 Number of arms
 Between 5 and 50
Asteroidea – Zoology II

8. ANATOMY – EXTERNAL
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 Shape of the arms
Asteroidea – Zoology II

9. ANATOMY – BODY WALL
 Epidermis
 Mono-ciliated, non-ciliated, mucous and
sensory cellls
 Dermis
 Catch connective tissue and ossicles
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Asteroidea – Zoology II

10. ANATOMY – BODY WALL
 Estructures
 1 - Spines
 2 - Paxillae
 3 - Pedicellariae
 4 - Papulae
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1 2
3
3
4
Asteroidea – Zoology II

11. ANATOMY – INTERNAL
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4
2
3
1
Aboral surface view:
1 – Anus
2 – Pyloric stomach
3 – Pyloric caecum
4 – Cardiac stomach
Asteroidea – Zoology II

12. ANATOMY – INTERNAL
12
2
3
1
5
4
6
7
8
Aboral surface view:
1 – Madreporite
2 – Stone canal
3 – Ring canal
4 – Radial canal
5 – Lateral canal
6 – Ampulla
7 – Tube foot
8 – Polian vesicle
Asteroidea – Zoology II

13. PHYSIOLOGY – WATERVASCULAR SYSTEM
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VÍDEO
Asteroidea – Zoology II

14. PHYSIOLOGY – NUTRITION
 Cernivores
 Reef
 Plankton
 Extraoral digestion
14
VÍDEO
Asteroidea – Zoology II

15. PHYSIOLOGY – NUTRITION
 Primary digestion is extracellular
 Pyloric caecum
 Intra and extracellular digestion
 Absorption
 Excretion 15
Asteroidea – Zoology II

16. PHYSIOLOGY – CIRCULATORY SYSTEM
 Coelomic circulation
 Water vascular system
 Perivisceral coelom
 Hyponeural system
 Perihemal system
 Genital system
 Ciliary action
 Excretion
 Diffusion
 Celomocytes
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Asteroidea – Zoology II

17.  Gas exchange
 Papulae
 Tube feet
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PHYSIOLOGY – CIRCULATORY SYSTEM
Asteroidea – Zoology II

18. PHYSIOLOGY – NERVOUS SYSTEM
 Associated to the epidermis
 Circum-oral nerve ring
 Radial nerve
 Ocelli
 Diffuse sensory cells 18
Asteroidea – Zoology II

19. PHYSIOLOGY – REGENERATION
 Arm + central disc
 Slow regeneration
19
Asteroidea – Zoology II

20. REPRODUCTION AND LIFE CYCLE
 Asexual reproduction
 Central disc division
 Linckia
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Asteroidea – Zoology II

21. REPRODUCTION AND LIFE CYCLE
 Sexual reproduction
 Dioecious
 Gonads
 External fertilization
 Planktonic eggs and larvae
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Asteroidea – Zoology II

22. REPRODUCTION AND LIFE CYCLE
 Larval development
 Bipinnaria larva
 Brachiolaria larva
 Metamorphosis
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Asteroidea – Zoology II

23. REPRODUCTION AND LIFE CYCLE
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VÍDEO
Asteroidea – Zoology II

24. GROUPS
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1 2
3 4
5 6 7
1
2
3
7
4
5
6
Asteroidea – Zoology II

25. ECOLOGY
 Distribution and habitat
 Strategies against predation
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Asteroidea – Zoology II

26. ECOLOGY
 Ecological impact
 Biodiversity
 Overpopulation
 Bioindicators
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Asteroidea – Zoology II

27. DOUBTS? 27

28. REFERENCES
 Invertebrate zoology, Rupert & Barnes, 6ª ed.
 http://.cronodon.com/BioTech/Asteroids.html
 http://.animaldiversity.ummz.umich.edu/accounts/Asteroidea
 http://animalbiology101.tumbler.com/echinodermata
 http://ucmp.berkley.edu/echinodermata/asteroidea.html
 http://tolweb.org/Asteroidea
 http://cifonauta.cebimar.usp.br/táxon/asteroidea
 http://en.wikipedia.org/wiki/Starfish 28