03_Feb23_slides - 2/23/2011 LearningObjectives Identify...

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2/23/2011 1 Learning Objectives Identify diagnostic characteristics of Lophotrochozoa and Ecdysozoa and explain the phylogenetic positions of these groups Identify major groupings within the Lophotrochozoa and Ecdysozoa ; describe distinguishing features among groups, where on Earth these organisms are typically found and how they make a living When presented with an organism belonging to one of the above groups, or when presented with a description of the organism, correctly diagnose the group to which it belongs Calcarea and Silicea Which of the groups below contains vertebrates? A. Lophotrochozoa B. Ecdyozoa C. Deuterostomia D. None of them ANCESTRAL PROTIST Common ancestor of all animals Eumetazoa Bilateria Cnidaria Lophotrochozoa Ecdysozoa Deuterostomia Calcarea and Silicea According to this tree, Lophotrochozoa are more closely related to Cnidaria than Ecdysozoa A. True B. False ANCESTRAL PROTIST Common ancestor of all animals Cnidaria Lophotrochozoa Ecdysozoa Deuterostomia Brachiopods (“lamp shells”) look like clams but they are not closely related Shell (valve) Lophophore Brachiopods attach to substrates via a pedicle and feed using a lophophore Shell (valve) Pedicle
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2/23/2011 2 Shell split open ~ 99% of Brachiopod species are extinct Phylum Mollusca : Typically have a calcium carbonate shell secreted by a mantle and a radula for feeding mantle radula Class Polyplacophora : Chitons have shells composed of 8 overlapping plates ventral mouth dorsal anus foot gills Polyplacophora probably have A. No radula B.Trochophore larvae C. No mantle D. Mouth = anus
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This note was uploaded on 08/09/2011 for the course BIOL 172 taught by Professor Huddleston,m during the Spring '08 term at University of Hawaii, Manoa.

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03_Feb23_slides - 2/23/2011 LearningObjectives Identify...

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