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Rotifers - Rotifers Phylum Rotifera Alimentary canal w...

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03/10/2010 Rotifers Phylum Rotifera Alimentary canal w/ separate mouth & anus Pseudocoelomate Reproduce by parthenogenesis Phylum Mollusca - Figure 33.15 - Radula p asp-like feeding organ, scraps & scoops food ite ms. Class Polyplacophora a.k.a., Chitons Shell has 8 plates Foot used for locomotion Fadula No ture h e ad Class Gastropoda Snails and slugs Asym m etrical body usually with a coiled shell - Result of torsion, rotation of the visceral m a ss Foot for locomotion Radula Class Bivalvia Clams, m uss els, scallops, oysters Flatten ed sh ell with 2 valves Head reduced Paired gills No radula Mostly susp ension feed ers Class Cephalopoda Squids, octopods, cuttlefish, cha m b ered n autili Head surround ed by grasping tent acles - Usually with suckers Shell m ay b e ext ernal, internal, or a bs ent Phylum Annelida - Annelids are also coeleo m at e Anatomy of Annelid (e.q., Earthworm) Body is divided into s eg m e nts -
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