Bio 201 F07 True lect 16 post

Bio 201 F07 True lect 16 post - Clarifcation • Picture of...

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Unformatted text preview: Clarifcation • Picture of male and female Schistosoma in last lecture was labeled correctly – Male is generally much larger than female • During the whole adult life stage, the male and female live in close contact, with the male body entirely surrounding the female body Precambrian Porifera Cnidaria Ctenophora Platyhelminthes Rotifera Nemertea Bryozoa Phoronida Brachiopoda Mollusca Annelida Nematoda Arthropoda Echinodermata Chordata Parazoa Radiata Eumetazoa Bilateria Protostomia Deuterostomia Lophotrochozoa Ecdysozoa Ancestral Colonial choanoflagellate Molluscs are: • Triploblasts • Eucoelomates • Lopho- trochozoans Major Classes of molluscs (Phylum Mollusca) • Polyplocophora - chitons – “Polyplacophores” • Gastropoda - snails, slugs – “Gastropods” • Bivalvia - clams, oysters, mussels, scallops – “Bivalves” • Cephalopoda - squid, octopus – “Cephalopods” 4 Basic Body Regions Head Head- cephalized (has a “head end”) Foot Foot- muscular Visceral Mass Visceral Mass- dorsal extension from body...
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  • Fall '08
  • Haltiwanger
  • Molluscs Unsegmented body, Molluscs Shell Secreted, Radula chitinous ribbon, Molluscs Circulatory, ducts Muscular body

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Bio 201 F07 True lect 16 post - Clarifcation • Picture of...

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