3. Meet the Lower Invertebrates Kingdom-Animalia
Major Phyla – 1 st  Notes <ul><li>A) Phylum Porifera-Unit 6 </li></ul><ul><li>B) Phylum Cnidaria-Unit 6 </li></ul><ul><li>...
A) Phylum Porifera <ul><li>The Sponges </li></ul><ul><li>Most primitive animals – no symmetry, few systems </li></ul><ul><...
B) Phylum Cnidaria <ul><li>Jellyfish (AKA Sea Jellies), sea anemones, and corals </li></ul><ul><li>Members of this group h...
Cnidaria Life Stages:  Medusa vs. Polyp
C) Phylum Annelida <ul><li>The Worms! </li></ul><ul><li>Bilateral symmetry </li></ul><ul><li>Three important marine worms:...
D) Phylum Echinodermata
Echinoderm Water Vascular System
Movement –  Hydraulic Pressure System
Class – Stelleroidea – the Stars!
Subclass Asteroidea (sea stars-a.k.a. starfishes)   <ul><li>As it changes from being meroplanktonic to benthic a young sta...
In some reefs (Australia, Queensland) Crown-of-Thorn outbreaks have reduced coral cover by 95% Some seastars have “issues”
Subclass Ophiuroidea (basket stars, brittlestars, and snake stars)
Class Holothuroidea (sea cucumbers)
Class Echinoidea (heart urchins, sand dollars, and sea urchins)
References <ul><li>http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20102/Bio%20102%20lectures/Animal%2...
Upcoming SlideShare
Loading in …5
×

3 meet the invertebrates

977 views

Published on

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
977
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
11
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

3 meet the invertebrates

  1. 1. 3. Meet the Lower Invertebrates Kingdom-Animalia
  2. 2. Major Phyla – 1 st Notes <ul><li>A) Phylum Porifera-Unit 6 </li></ul><ul><li>B) Phylum Cnidaria-Unit 6 </li></ul><ul><li>C) Phylum Annelida-Unit 6 </li></ul><ul><li>D) Phylum Echinodermata-Unit 6 </li></ul><ul><li>E) Phylum Mollusca-Unit 7 </li></ul><ul><li>F) Phylum Arthropoda-Unit 7 </li></ul>
  3. 3. A) Phylum Porifera <ul><li>The Sponges </li></ul><ul><li>Most primitive animals – no symmetry, few systems </li></ul><ul><li>Kept upright by spicules , glassy or chalky needles inside them  </li></ul>
  4. 4. B) Phylum Cnidaria <ul><li>Jellyfish (AKA Sea Jellies), sea anemones, and corals </li></ul><ul><li>Members of this group have stinging cells called cnidoblasts containing toxins </li></ul><ul><li>Radially symmetrical – like spokes on a wheel </li></ul><ul><li>Live with symbiotic dinoflagellates: zooxanthellae </li></ul><ul><li>Have 2 forms: medusa & polyp </li></ul>
  5. 5. Cnidaria Life Stages: Medusa vs. Polyp
  6. 6. C) Phylum Annelida <ul><li>The Worms! </li></ul><ul><li>Bilateral symmetry </li></ul><ul><li>Three important marine worms: </li></ul><ul><ul><li>Platyhelminthes - flatworms </li></ul></ul><ul><ul><li>Nematodes - roundworms </li></ul></ul><ul><ul><li>Polychaetes – bristly, segmented worms </li></ul></ul>
  7. 7. D) Phylum Echinodermata
  8. 8. Echinoderm Water Vascular System
  9. 9. Movement – Hydraulic Pressure System
  10. 10. Class – Stelleroidea – the Stars!
  11. 11. Subclass Asteroidea (sea stars-a.k.a. starfishes) <ul><li>As it changes from being meroplanktonic to benthic a young starfish’s typical meals may consist of 56 small mussels during its first 6 days (about 25-30 % of its own weight) </li></ul>
  12. 12. In some reefs (Australia, Queensland) Crown-of-Thorn outbreaks have reduced coral cover by 95% Some seastars have “issues”
  13. 13. Subclass Ophiuroidea (basket stars, brittlestars, and snake stars)
  14. 14. Class Holothuroidea (sea cucumbers)
  15. 15. Class Echinoidea (heart urchins, sand dollars, and sea urchins)
  16. 16. References <ul><li>http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/Bio%20102/Bio%20102%20lectures/Animal%20Development/starfish_development.jpg </li></ul><ul><li>http://animaldiversity.ummz.umich.edu/site/accounts/pictures/Echinodermata.html </li></ul>

×