caa a22 4500 445343281 CHVBK 20180317142820.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s00436-010-2178-2 doi (NATIONALLICENCE)springer-10.1007/s00436-010-2178-2 Spermatological characters of the digenean Rubenstrema exasperatum (Rudolphi, 1819) (Plagiorchioidea, Omphalometridae) [Elektronische Daten] [Abdoulaye Bakhoum, Cheikh Bâ, Vladimir Shimalov, Jordi Torres, Jordi Miquel] We present the first ultrastructural description of spermiogenesis and of the spermatozoon of Rubenstrema exasperatum (Omphalometridae), an intestinal parasite of Sorex araneus (Soricidae). Spermiogenesis begins with the formation of the differentiation zone delimited at the base by the ring of the arched membranes and bordered by cortical microtubules. This area contains two centrioles associated with striated rootlets and with an intercentriolar body. It also contains the nucleus and numerous mitochondria. The intercentriolar body is made up of seven electron-dense layers. The two centrioles give rise to two free flagella that grow orthogonally to the median cytoplasmic process. Additionally, flagellar rotation is followed by the proximodistal fusion of the flagella with the median cytoplasmic process, while the nucleus and mitochondria migrate along the spermatid. The constriction of the ring of arched membranes gives rise to the young spermatozoon. The mature spermatozoon of R. exasperatum shows several ultrastructural characters found in digenean spermatozoa such as two axonemes, mitochondrion, two bundles of parallel cortical microtubules, nucleus, and granules of glycogen. External ornamentation of the plasma membrane and spinelike bodies are also present in the spermatozoon of this species. In the present study, we produced additional spermatological data concerning a previously unexplored family, and we also compare our data to the existent ultrastructural descriptions within the Digenea in order to assess the use of several characters proposed as phylogenetic tools. Springer-Verlag, 2010 Bakhoum Abdoulaye Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028, Barcelona, Spain aut Bâ Cheikh Laboratoire de Parasitologie-Helminthologie, Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Dakar, Senegal aut Shimalov Vladimir Brest State University, 224665, Brest, Belarus aut Torres Jordi Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028, Barcelona, Spain aut Miquel Jordi Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028, Barcelona, Spain aut Parasitology Research Springer-Verlag 108/5(2011-05-01), 1283-1293 0932-0113 108:5<1283 2011 108 436 https://doi.org/10.1007/s00436-010-2178-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00436-010-2178-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bakhoum Abdoulaye Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Bâ Cheikh Laboratoire de Parasitologie-Helminthologie, Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Dakar, Senegal aut NATIONALLICENCE 700 1- Shimalov Vladimir Brest State University, 224665, Brest, Belarus aut NATIONALLICENCE 700 1- Torres Jordi Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Miquel Jordi Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028, Barcelona, Spain aut NATIONALLICENCE 773 0- Parasitology Research Springer-Verlag 108/5(2011-05-01), 1283-1293 0932-0113 108:5<1283 2011 108 436 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer