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Unformatted text preview: The Lophotrochozoans • Bilaterally symmetrical, triploblastic, invertebrate animals o Platyhelminthes o Rotifer o Ectoprocta o Mollusca o Annelid • Platyhelminthes o Marine freshwater and damp terrestrial habitats o Parasitic o Acoelomate (no fluid filled cavity between digestive cavity) o Incomplete digestive system(gastrovascular cavities) or lack digestive system o Class turbellaria Flatworms, marine Dugesia, freshwater carnivores, scavengers, sephalized, cilia, eye spots, and nerve system Copulation, each partner inseminates the other o Class tematoda Flukes Parasites, suckers Gastrovascular cavities Host, larvae, host, adult Sichistosomiasis • Separate male and female, lood flukes • Live in constant state of copulation • Digs through the skin o Class cestoda Tapeworm Parasitic worms • Phylum Rotifera o Mostly freshwater o Pseudocoelomates (have a body cavity-not lined wihth muscle tissue) o Complete digestive system o Some species entirely females Produced from unfertilized (2N) eggs produced by mitosis Parthenogenesis(only female diploid eggs) • Phylum ectoprocta o...
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- Spring '10
- Biology, Annelid, Ventral nerve cord, fil ter, Phylum Ar thropoda