Lecture3Molluscs1 - Lecture Topic Molluscs Reading...

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Molluscs Slide 1 Lecture Topic: Molluscs Reading: Invertebrates, CHAPTER 33, pages 638-670. (concentrate on 33.4)
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Molluscs Slide 2 93,000 described species + 70,000 known fossil molluscs it is estimated that only half are described C On the criteria of species diversity, distribution, and sheer numbers, arthropods must be regarded as the most successful animal phylum.
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Molluscs Slide 3 phylum Mollusca vernacular = mollusc (singular) molluscs (plural) molluscan, molluscoid, molluscivore molluscus (Latin), meaning soft
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Molluscs Slide 4 Tridacna = giant clam scallops = bivalve abalone = gastropod wentletrap =gastropod Brechites = bizarre bivalve cone snail = gastropod nudibranch = gastropod Helix = gastropod Octopus = cephalopod
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Molluscs Slide 5 Figure 32.10, page 635 Calcarea Silicarea Ctenophora Cnidaria Echinodermata Chordata Brachiopoda Phoronida Ectoprocta Platyhelminthes Nemertea Mollusca Annelida Rotifera Nematoda Arthropoda “Radiata” “Porifera” Deuterostomia Lophotrochozoa Ecdysozoa Bilateria Eumetazoa Metazoa Ancestral colonial flagellate molecules Who are the closest relatives of molluscs?
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Molluscs Slide 6 phylum Mollusca Molluscs have a muscular foot, a visceral mass, and a mantle includes snails and slugs, oysters and clams, and octopuses and squids Most molluscs are marine
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  • Fall '06
  • 11:00-01:50pm
  • Evolution, Molluscs Slide, Echinodermata Platyhelminthes Cnidaria Brachiopoda Ctenophora Chordata Calcarea Rotifera Ectoprocta Arthropoda Phoronida Nemertea Mollusca Silicarea Annelida Nematoda, Mollusc Radula

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