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Aspects of the phylogeny of Platyhelminthes based on 18S ribosomal DNA and protonephridial ultrastructure

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    Abstract

    Comparative spermatology based on electron microscopy (EM) has been used extensively in several invertebrate phyla as an aid to phylogenetic resolution and clarification. In the Platyhelminthes a considerable ...

    N.A. Watson, E.R. Schockaert in Hydrobiologia (1998)

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