week 8 - 3/4/2010 CiliophoraVorticella Amoeba

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3/4/2010 1 Vorticella Amoeba Ciliophora- http://www.pirx.com/droplet/gallery/vorticella/vorticella15.jpg http://www.bms.ed.ac.uk/research/others/smaciver/Cofilin%20topics/amoeba1.gif Volvox A green algae (Chlorophyceae) Hydra Invertebrates so far Porifera Cnidaria Platyhelmithes Turbellaria Trematode Cestoda Nematoda Nemertea Phylum Gastrotricha Very common Little studied Unsegmented Digestive system, distinct head, Benthic habitats Anoxia and exposure to sulfide Feed on bacteria, protozoa, algae, detritus http://www.gpmatthews.nildram.co.uk/animalcules/gastrotricha/gastrotrich02.jpg furca
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3/4/2010 2 Rotifera ~2500 species in FW Ciliated head region ( Corona ) Digestive system w/ mastax to grind food Intestine anus Brain, eyespot Most parthenogenetic Nematoda (the roundworms) Nonsegmented, worm like Cylindrical cross section Complete alimentary tract, & body cavity Nervous system, Excretory system, Musculature system, Most < 1 cm Parthenogenic /sexual ht p:/ www.ars-grin.gov/ars/SoAtlantic/fp/stpp/burel e/nematode.jpg Nematoda Predators, herbivores (algae), parasites, Guinea worm disease ( Dracunculus medinensis ) “fiery burning worm” River blindness (onchocerciasis) transmitted by black flies Trichinosis ( Trichinella spiralis ): from eating raw undercooked pork and wildgame http://neatorama.cachefly.net/images/2006-08/guinea-worm.jpg ht p:/ s3.amazonaws.com/readers/healthmad/2008 /05/14/162234_6.jpg Guinea worm disease
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3/4/2010 3 http://timpanogos.files.wordpress.com/2007/09/river_blindness_cycle-carter-center-alberto-cuadra.jpg Nematomorpha (horsehair worms) Parasitic Reproduce sexually, lay eggs Cm – to meter long No digestive tract Emerges from host when near water Mollusca ~ 75,000 species Unsegmented Soft bodied Head, Foot, Visceral mass, mantle 2 classes Gastropoda (snails and limpets) Bivalvia (clams and mussels) www.xerces.org/aquatic/freshwater_mussels.htm Gastropoda Snail - ~500 FW species in N. America One piece shell Radula Parthenogenic/ sexual (hermaphroditic) Detritus, periphyton, carrion limpets Apple snail http://pro.corbis.com/images/42-20490818.jpg?size=67&uid={bfd0dab7-1943-442e-8ef9-e54b0184b211}
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week 8 - 3/4/2010 CiliophoraVorticella Amoeba

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