27-Invertebrates - Origin of Animals Origin of Animals and...

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Unformatted text preview: Origin of Animals Origin of Animals and and volution of Invertebrates volution of Invertebrates CHOANOFLAGELLATES (COLLAR FLAGELLATES) Sponge Collar Cell (Choanocyte) The ambrian Explosion Time Magazine December 4, 1995 BURGESS SHALE FAUNA (Mid-Cambrian- 515 Ma) Invertebrates Animals Without A Backbone SIMPLE SIMPLE INVERTEBRATES INVERTEBRATES Sponges and Jellyfish Flatworms and Nematodes Sponges Jellyfish Flatworms Nematodes PHYLLUM PORIFERA: Sponges 9,000 species Mostly Marine, a Few Freshwater Attached Filter-Feeders with Pores and a System of Canals and Chambers Skeletal System of Spicules Cnidarians - JELLYFISH Sea Anemones Alicia Bunodactis Condylactis Corynactis Aiptasia Actinia SIMPLE WORM SIMPLE WORM GROUPS GROUPS Flatworms and Nematodes MOLLUSKS MOLLUSKS EVOLUTION OF SHELLED ANIMALS APLACOPHORANS CHITONS PELECYPODS (BIVALVES) Living Scallops Living Clam Pecten- Scallop Relative (Eocene) GASTROPODS WHELK CLIOPSIS (Sea Butterfly) CARINARIA (heteropod snail) CONUS (cone shell) ollusk Eaten by Loggerhead Turtle (Turtle- Caretta caretta ) GASTROPODS NUDIBRANCHS (“naked gills”) CEPHALOPODS COLEOIDS Cuttlefish Squid Octopus Blue-Ringed Octopus (extremely poisonous) Octopus Camouflage ( Octopus vulgaris ) From Roger Hanlon- Marine Biological Laboratory (MBL), Woods Hole, Mass. NNELIDS & ARTHROPODS NNELIDS & ARTHROPODS EVOLUTION OF SEGMENTED ANIMALS Annelids- Oligochetes...
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This note was uploaded on 11/22/2011 for the course BIOLOGY 190a taught by Professor Staff during the Fall '11 term at UMass (Amherst).

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27-Invertebrates - Origin of Animals Origin of Animals and...

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