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Invertebrate Diversity

Invertebrate Diversity. Chapter 33. The Ancestors. Protists : Choanoflagellates Colonies formed/ turned into super colonies. Porifera – The Sponges. Porifera – The Sponges. Asymmetrical body plan No tissue layer Sexual reproduction - hemaphroditic Sessile filter feeder

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Invertebrate Diversity

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  1. Invertebrate Diversity Chapter 33

  2. The Ancestors • Protists: Choanoflagellates • Colonies formed/ turned into super colonies

  3. Porifera – The Sponges

  4. Porifera – The Sponges • Asymmetrical body plan • No tissue layer • Sexual reproduction - hemaphroditic • Sessile filter feeder • Grouped based on “skeleton” type. • Can form gemmules for protection.

  5. Gemmules

  6. Cnidaria • Examples: jellyfish, anemones, hydra and coral

  7. Cnidaria • Named for cnidocytes

  8. Cnidaria • Diploblastic • Two body forms: polyp & medusa • Grouped based on amount of life spent as polyp or medusa

  9. Cnidaria

  10. Platyhelminthes - Flatworms • Examples: planaria, liver flukes, tapeworms

  11. Platyhelminthes - Flatworms • Bilateral symmetry • Simple organ systems • Reproduce sexually and asexually • Acoelomate • Triploblasitc • Most are parasitic

  12. Rotifera • Named for feeding rotors • Pseudocoelomates • Reproduce via parthenogenisis • Have an anus! • Images from http://www.microscopy-uk.org.uk

  13. Nematoda – Roundworms • Found in most aquatic habitats, soil, and in plant and animal tissues • Parasitic – hookworms, pinworms, round worms, heart worms .

  14. Nematoda – Roundworms • Pseudocoelomates • Simple organs

  15. Annelida – Segmented Worms • Examples: earthworms, fireworms, leeches

  16. Annelida – Segmented Worms • “Little rings” –repeating segments, some specialized • Coelomates • Setae • Parapodia

  17. Annelida – Segmented Worms • Fairly complex anatomy

  18. Mollusca • Largest classes: • Gastropods • Bivalves • Cephalopods

  19. Mollusca Muscular foot Head Visceral Mass

  20. Arthropoda • “Jointed foot” • Crustaceans-hexapods-myriapods-cheliceroforms

  21. Arthropoda • Most successful animal phyla – 67% of all species!

  22. Arthropoda • Exoskeleton – ecdysis • Open circulatory system • Tracheal tubes • Spiracels vs. book lungs • Malpighian tubules

  23. Echinodermata • “Spiny Skin” • No head or brain • Radial symmetry • Simple anatomy • Deuterostomes • Endoskeleton • Tube feet • Water vascular system

  24. classification

  25. Species • LatrodectusWalckenaer, 1805 • Latrodectusantheratus (Badcock, 1932) — Paraguay, Argentina • Latrodectusapicalis Butler, 1877 — Galapagos Islands • LatrodectusbishopiKaston, 1938 — USA • LatrodectuscinctusBlackwall, 1865 — Cape Verde Islands, Africa, Kuwait • LatrodectuscorallinusAbalos, 1980 — Argentina • Latrodectuscuracaviensis (Müller, 1776) — Lesser Antilles, South America • Latrodectusdahli Levi, 1959 — Middle East to Central Asia • LatrodectusdiaguitaCarcavallo, 1960 — Argentina • LatrodectuselegansThorell, 1898 — China, Myanmar, Japan • Latrodectuserythromelas Schmidt & Klaas, 1991 — Sri Lanka • Latrodectusgeometricus C. L. Koch, 1841 — Cosmopolitan • LatrodectushasseltiThorell, 1870 — Southeast Asia to Australia, New Zealand • Latrodectushesperus Chamberlin & Ivie, 1935 — North America, Israel • Latrodectushystrix Simon, 1890 — Yemen, Socotra • Latrodectusindistinctus O. P.-Cambridge, 1904 — Namibia, South Africa • LatrodectuskarrooensisSmithers, 1944 — South Africa • Latrodectus katipo Powell, 1871 — New Zealand • LatrodectuslilianaeMelic, 2000 — Spain • Latrodectusmactans (Fabricius, 1775) — probably native to North America only (introduced elsewhere) • Latrodectusmenavodi Vinson, 1863 — Madagascar, Comoro Islands • Latrodectus mirabilis (Holmberg, 1876) — Argentina • Latrodectusobscurior Dahl, 1902 — Cape Verde Islands, Madagascar • Latrodectuspallidus O. P.-Cambridge, 1872 — Cape Verde Islands, Libya to Russia, Iran • LatrodectusquartusAbalos, 1980 — Argentina • Latrodectusrenivulvatus Dahl, 1902 — Africa, Saudi Arabia, Yemen • LatrodectusrevivensisShulov, 1948 — Israel • Latrodectusrhodesiensis Mackay, 1972 — Southern Africa • Latrodectustredecimguttatus (Rossi, 1790) — Mediterranean to China • Latrodectusvariegatus Nicolet, 1849 — Chile, Argentina • LatrodectusvariolusWalckenaer, 1837 — USA, Canada

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