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212MolluscaLOs - Phylum Mollusca Class Gastropoda •...

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BIOL 212 Mollusca Wennstrom Goals Read the introductory material in the chapter on Mollusca in your lab atlas. Supplement with readings from your text as needed. Recognize all taxa and structures of the organisms below from live or preserved specimens or microscope slides. In any given specimen, be able to identify the three major structures common to all mollusks: foot , mantle , visceral mass . Be able to recognize examples of Gastropoda, Cephalopoda, and Bivalvia from shells alone. Know the broad category of habitat each organism lives in (i.e. saltwater, freshwater, terrestrial). Know the general feeding habits of each organism (i.e. parasitic, filter feeder, carnivore)
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Unformatted text preview: Phylum Mollusca Class Gastropoda • Radula (S) • Denticles (S) • Head (P) • Tentacles (P) • Pneumostome (P, terrestrial snails & slugs only) Class Bivalvia • Umbo (DP) • Anterior adductor muscles (D) • Posterior adductor muscles (D) • Incurrent siphon (DP) • Excurrent siphon (DP) • Gills (D) Class Cephalopoda • Arm (DPS) • Tentacle (DPS) • Eye (D) • Beak (D) • Pen (shell remnant) (D) • Gills (D) • Siphon (funnel) (DP) • Ink sac (D) • Ovary (D) • Testis (D) • Loligo (genus of squid we’re dissecting) Class Polyplacophora • Shell (P) • Shell plates (P) Key : D=dissection, P=preserved specimen, S= microscope slide...
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