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C Invert I outline

C Invert I outline - A Classes i Polychaetes ii...

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Bio 1A Lab Lecture Outline # 9 Invertebrate I October 26 th , 2009 I. Kingdom: Porifera (sponges), 6,000 species A. Simple sessile organisms that lack true tissues, filter feeders. B. Mostly marine, several cell types. C. Images. II. Cnidarians, 10,000 species, mostly marine A. Classes: i) Anthozoa – corals, anemones, ii) Hydrazoa – hydras, man of war, iii) Scyphazoa - jellyfish, iv) Cubozoa – box jellyfish (box shaped with eyes) B. Features: gastrovascular cavity, polyp vs. medusa, cnidocytes with nematocysts. C. Observation, feeding, slides. III. Platyhelminthes: 20,000 species, mostly parasitic, mostly hermaphroditic, flatworms, A. Classes: i) Trematoda – flukes, ii) Cestoda – tape worms, iii) Turbellaria (free living) B Features: Complex life cycles, flattened dorsoventrally, triploblastic, cephalization, protonephridia (osmotic balance) C. Observation, feeding, slides of Planaria . IV. Annelida: 15,000 species, segmented worms, setae or bristles,
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Unformatted text preview: A. Classes: i) Polychaetes, ii) Oligochaetes iii) Hirudinea (leeches). B. Featues: metamerism, GI tract, coelom, closed circulatory system C. Observation, dissection, slides. V. Mollusca: 100,000 species, 5 derived features: mantle, foot, radula, ctenidium, shell. A. Classes: i) Polyplacophora, ii) Gastropoda (most diverse), iii) Bivalves, iv) Cephalapoda B. Features: mantle, "visceral mass", C. Observation, dissection demonstration, radula slide. VI. Dissection techniques and doing well! A. Use lighting! Use ringers! Lift up the scissors as you make cuts. B. Make good drawings. Digital photographs? Is it worth the effort? C. Examine review sheets during and fill out the charts. VI. Phylogenetic trees A. Many potential ones depending upon the emphasis. B. See p. 164 of the lab manual for illustrations of organisms. C. There is a summary Cladogram on the next page. . Fall 2009 Use the following cladogram for Fall 2009....
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