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Nais

oligochaete genus

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annotated classification

  • structure of polychaetes
    In annelid: Annotated classification

    …1–3 cm; examples of genera: Nais, Tubifex (sludge worm). Class Hirudinea (leeches) Primarily freshwater, but also terrestrial and marine forms; small sucker at anterior end, large sucker at posterior end; fixed number of body segments at 34; body cavity filled with connective tissue; hermaphroditic, with fertilized eggs

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