T Tappenden

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The ultrastructural events of spermiogenesis and the ultrastructure of the mature spermatozoon of an acanthocotylid monogenean, Acanthocotyle lobianchi, are described. The early zone of differentiation (ZD) contains two roughly perpendicular centrioles which become parallel and produce two free flagella, although these later become incorporated into the(More)
The monogenean (platyhelminth) skin parasite Entobdella soleae from the common sole (Solea solea) lays tetrahedral eggs. One of the 4 corners of the tetrahedron is a detachable operculum which is bonded to the rest of the egg-shell by cement. Most of this cement layer, beginning at the inner surface of the shell and running through almost to the outer(More)
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