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Title of Journal: Parasitol Res

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Abbravation: Parasitology Research

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Springer-Verlag

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DOI

10.1007/bf00323043

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1432-1955

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Spermatological characters of the spathebothriidea

Authors: Magdaléna Bruňanská Larisa G Poddubnaya
Publish Date: 2010/03/30
Volume: 106, Issue: 6, Pages: 1435-1442
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Abstract

Spermiogenesis and the spermatozoon ultrastructure of the adult Didymobothrium rudolphii Spathebothriidea have been examined using transmission electron microscopy for the first time The dense material is present in the apical region of the differentiation zone in the early stage of spermiogenesis similarly as in other basal tapeworms examined to date The orthogonal development of the two flagella is followed by a flagellar rotation and their proxiMODIStal fusion with the median cytoplasmic process MCP The two pairs of electrondense attachment zones in the MCP mark the lines where the proxiMODIStal fusion of MCP with two axonemes takes place D rudolphii exhibits polymorphism of the intercentriolar body during spermiogenesis The mature spermatozoon possesses the two axonemes of 9 + “1” trepaxonematan pattern nucleus cortical microtubules CMs and electrondense granules The anterior extremity of the gamete lacks a crested body and exhibits a centriole surrounded by a semiarc of electrondense tubular structures The two parallel rows of the CMs have been found in the proximal part of the twoaxoneme region of the spermatozoon for the first time in the Eucestoda The posterior extremity of the gamete exhibits pattern of the disorganized axoneme The ultrastructural features of the sperm/spermiogenesis support a view about the close relationships of the Spathebothriidea and Diphyllobothriidea and the basal position of the Spathebothriidea within the EucestodaThe valuable help of Borislav Kostič and Peter Šalamún Parasitological Institute SAS Košice Slovak Republic with the preparation of the plates with figures and the drawing is thankfully acknowledged The authors extend their appreciation to Drs Peter D Olson David I Gibson Natural History Museum London Maria Joăo Santos Universidade do Porto and Joana Marques Universidade de Lisboa for the supply of tapeworms used in the present investigation Thanks to the staff of the Center of Electron Microscopy Institute of Biology of Inland Waters Borok Russia for the technical assistance Financial support was provided by the Grant Agency of the Slovak Republic VEGA project no 2/0018/08 and the Russian Foundation for Fundamental research project no 090400342

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