Spermatozoon ultrastructure of Aponurus laguncula (Digenea: Lecithasteridae), a parasite of Aluterus monoceros (Pisces: Teleostei) |
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| Authors: | Y Quilichini J Foata J-L Justine RA Bray B Marchand |
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| Institution: | 1. CNRS UMR 6134, University of Corsica, “Parasites and Mediterranean Ecosystems” Laboratory, BP 52, 20250 Corte, France;2. Équipe Biogéographie Marine Tropicale, Unité Systématique, Adaptation, Évolution (CNRS, UPMC, MNHN, IRD), Institut de Recherche pour le Développement, BP A5, 98848 Nouméa Cedex, Nouvelle-Calédonie, France;3. Department of Zoology, Natural History Museum, Cromwell Road, London SW7 5BD, UK;1. Laboratorio de Parasitología, Facultad de Farmacia, Universidad San Pablo CEU, Urbanización Montepríncipe, CP 28668, Boadilla del Monte, Madrid, Spain;2. Escuela de Microbiología, Grupo de Parasitología, Universidad de Antioquia, Calle 67 No. 53-108, Medellín, Colombia;3. Laboratorio de Genética, Facultad de Medicina, Universidad San Pablo CEU, Urbanización Montepríncipe, CP 28668, Boadilla del Monte, Madrid, Spain;1. Laboratorio de Ictioparasitología, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Funes 3350, 7600 Mar del Plata, Argentina;2. Departamento de Parasitologia Animal, Universidade Federal Rural do Rio de Janeiro, Caixa Postal 74.540, 23851-970, Seropédica, RJ, Brazil;1. Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic, v.v.i., ?eské Budějovice, Czech Republic;2. Faculty of Agriculture, University of South Bohemia in ?eské Budějovice, Czech Republic;3. Faculty of Economics, University of South Bohemia in ?eské Budějovice, Czech Republic;4. Veterinary and Microbiological Sciences Department, North Dakota State University, Fargo, USA;1. Area of Parasitology, Department of Microbiology, Preventive Medicine and Public Health, Faculty of Medicine, University of Zaragoza, C/ Domingo Miral s/n, Zaragoza, Spain;2. Metropolitan District of Granada''s Epidemiology and Programs Unit, C/ Gustavo Dore, no. 3, Bajo, Granada, Spain;3. Department of Microbiology, University Hospital Virgen de las Nieves, Granada, Spain;4. Department of Microbiology, Faculty of Medicine, University of Granada, Avenida de Madrid, s/n, Granada, Spain;1. Department of Pathology and Parasitology, State Veterinary Institute Prague, Czech Republic;2. Department of Animal Science and Food Processing in the Tropics and Subtropics, Faculty of Tropical AgriSciences, Czech University of Life Sciences, Prague, Czech Republic |
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| Abstract: | The mature spermatozoon of Aponurus laguncula, a parasite of the unicorn leatherjacket Aluterus monoceros, was studied by transmission electron microscopy. The spermatozoon possesses 2 axonemes of the 9 + “1” trepaxonematan pattern, attachment zones, a nucleus, a mitochondrion, external ornamentation of the plasma membrane and cortical microtubules. The major features are the presence of: 1) external ornamentation in the anterior part of the spermatozoon not associated with cortical microtubules; 2) one mitochondrion; and 3) cortical microtubules arranged as a single field in the ventral side. The maximum number of microtubules is in the nuclear region. The extremities of the axonemes are characterized by the disappearance of the central core and the presence of microtubule doublets or singlets. This study is the first undertaken with a member of the Lecithasteridae and exemplifies the sperm ultrastructure for the superfamily Hemiuroidea. |
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