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1
ASTEROIDEA
UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE
CLASS: ZOOLOGY II
INTRODUCTION
Asteroidea
Starfish
Invertebrates
 Echinoderms
 Deuterostomes
 Pentameric radial
symmetry
2
Asteroidea ...
PHYLOGENY– ECHINODERMATA INSIDE METAZOA
3
Asteroidea – Zoology II
EMERGING PATTERNS
 Catch connective tissue
 Niche sharing
4
Asteroidea – Zoology II
PHYLOGENY – ASTEROIDEA INSIDE ECHINODERMATA
5
Asteroidea – Zoology II
ANATOMY – EXTERNAL
6
 Size
 Between12 and 24 cm
in diameter
Asteroidea – Zoology II
ANATOMY – EXTERNAL
7
 Number of arms
 Between 5 and 50
Asteroidea – Zoology II
ANATOMY – EXTERNAL
8
 Shape of the arms
Asteroidea – Zoology II
ANATOMY – BODY WALL
 Epidermis
 Mono-ciliated, non-ciliated, mucous and
sensory cellls
 Dermis
 Catch connective tissu...
ANATOMY – BODY WALL
 Estructures
 1 - Spines
 2 - Paxillae
 3 - Pedicellariae
 4 - Papulae
8
1 2
3
3
4
Asteroidea – Z...
ANATOMY – INTERNAL
11
4
2
3
1
Aboral surface view:
1 – Anus
2 – Pyloric stomach
3 – Pyloric caecum
4 – Cardiac stomach
Ast...
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...
PHYSIOLOGY – WATERVASCULAR SYSTEM
13
VÍDEO
Asteroidea – Zoology II
PHYSIOLOGY – NUTRITION
 Cernivores
 Reef
 Plankton
 Extraoral digestion
14
VÍDEO
Asteroidea – Zoology II
PHYSIOLOGY – NUTRITION
 Primary digestion is extracellular
 Pyloric caecum
 Intra and extracellular digestion
 Absorpt...
PHYSIOLOGY – CIRCULATORY SYSTEM
 Coelomic circulation
 Water vascular system
 Perivisceral coelom
 Hyponeural system
...
 Gas exchange
 Papulae
 Tube feet
17
PHYSIOLOGY – CIRCULATORY SYSTEM
Asteroidea – Zoology II
PHYSIOLOGY – NERVOUS SYSTEM
 Associated to the epidermis
 Circum-oral nerve ring
 Radial nerve
 Ocelli
 Diffuse senso...
PHYSIOLOGY – REGENERATION
 Arm + central disc
 Slow regeneration
19
Asteroidea – Zoology II
REPRODUCTION AND LIFE CYCLE
 Asexual reproduction
 Central disc division
 Linckia
20
Asteroidea – Zoology II
REPRODUCTION AND LIFE CYCLE
 Sexual reproduction
 Dioecious
 Gonads
 External fertilization
 Planktonic eggs and larv...
REPRODUCTION AND LIFE CYCLE
 Larval development
 Bipinnaria larva
 Brachiolaria larva
 Metamorphosis
22
Asteroidea – Z...
REPRODUCTION AND LIFE CYCLE
23
VÍDEO
Asteroidea – Zoology II
GROUPS
24
1 2
3 4
5 6 7
1
2
3
7
4
5
6
Asteroidea – Zoology II
ECOLOGY
 Distribution and habitat
 Strategies against predation
25
Asteroidea – Zoology II
ECOLOGY
 Ecological impact
 Biodiversity
 Overpopulation
 Bioindicators
26
Asteroidea – Zoology II
DOUBTS? 27
REFERENCES
 Invertebrate zoology, Rupert & Barnes, 6ª ed.
 http://.cronodon.com/BioTech/Asteroids.html
 http://.animald...
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Echinoderms - Asteroidea: phylogeny, anatomy, physiology and ecology

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.

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Echinoderms - Asteroidea: phylogeny, anatomy, physiology and ecology

  1. 1. 1 ASTEROIDEA UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE CLASS: ZOOLOGY II
  2. 2. INTRODUCTION Asteroidea Starfish Invertebrates  Echinoderms  Deuterostomes  Pentameric radial symmetry 2 Asteroidea – Zoology II
  3. 3. PHYLOGENY– ECHINODERMATA INSIDE METAZOA 3 Asteroidea – Zoology II
  4. 4. EMERGING PATTERNS  Catch connective tissue  Niche sharing 4 Asteroidea – Zoology II
  5. 5. PHYLOGENY – ASTEROIDEA INSIDE ECHINODERMATA 5 Asteroidea – Zoology II
  6. 6. ANATOMY – EXTERNAL 6  Size  Between12 and 24 cm in diameter Asteroidea – Zoology II
  7. 7. ANATOMY – EXTERNAL 7  Number of arms  Between 5 and 50 Asteroidea – Zoology II
  8. 8. ANATOMY – EXTERNAL 8  Shape of the arms Asteroidea – Zoology II
  9. 9. ANATOMY – BODY WALL  Epidermis  Mono-ciliated, non-ciliated, mucous and sensory cellls  Dermis  Catch connective tissue and ossicles 7 Asteroidea – Zoology II
  10. 10. ANATOMY – BODY WALL  Estructures  1 - Spines  2 - Paxillae  3 - Pedicellariae  4 - Papulae 8 1 2 3 3 4 Asteroidea – Zoology II
  11. 11. ANATOMY – INTERNAL 11 4 2 3 1 Aboral surface view: 1 – Anus 2 – Pyloric stomach 3 – Pyloric caecum 4 – Cardiac stomach Asteroidea – Zoology II
  12. 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. 13. PHYSIOLOGY – WATERVASCULAR SYSTEM 13 VÍDEO Asteroidea – Zoology II
  14. 14. PHYSIOLOGY – NUTRITION  Cernivores  Reef  Plankton  Extraoral digestion 14 VÍDEO Asteroidea – Zoology II
  15. 15. PHYSIOLOGY – NUTRITION  Primary digestion is extracellular  Pyloric caecum  Intra and extracellular digestion  Absorption  Excretion 15 Asteroidea – Zoology II
  16. 16. PHYSIOLOGY – CIRCULATORY SYSTEM  Coelomic circulation  Water vascular system  Perivisceral coelom  Hyponeural system  Perihemal system  Genital system  Ciliary action  Excretion  Diffusion  Celomocytes 16 Asteroidea – Zoology II
  17. 17.  Gas exchange  Papulae  Tube feet 17 PHYSIOLOGY – CIRCULATORY SYSTEM Asteroidea – Zoology II
  18. 18. PHYSIOLOGY – NERVOUS SYSTEM  Associated to the epidermis  Circum-oral nerve ring  Radial nerve  Ocelli  Diffuse sensory cells 18 Asteroidea – Zoology II
  19. 19. PHYSIOLOGY – REGENERATION  Arm + central disc  Slow regeneration 19 Asteroidea – Zoology II
  20. 20. REPRODUCTION AND LIFE CYCLE  Asexual reproduction  Central disc division  Linckia 20 Asteroidea – Zoology II
  21. 21. REPRODUCTION AND LIFE CYCLE  Sexual reproduction  Dioecious  Gonads  External fertilization  Planktonic eggs and larvae 21 Asteroidea – Zoology II
  22. 22. REPRODUCTION AND LIFE CYCLE  Larval development  Bipinnaria larva  Brachiolaria larva  Metamorphosis 22 Asteroidea – Zoology II
  23. 23. REPRODUCTION AND LIFE CYCLE 23 VÍDEO Asteroidea – Zoology II
  24. 24. GROUPS 24 1 2 3 4 5 6 7 1 2 3 7 4 5 6 Asteroidea – Zoology II
  25. 25. ECOLOGY  Distribution and habitat  Strategies against predation 25 Asteroidea – Zoology II
  26. 26. ECOLOGY  Ecological impact  Biodiversity  Overpopulation  Bioindicators 26 Asteroidea – Zoology II
  27. 27. DOUBTS? 27
  28. 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

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