Ultrastructure of the spermatozoon of Anomotaenia quelea (Mettrick, 1961) (Cestoda,Cyclophyllidea, Dilepididae), an intestinal parasite of Quelea quelea (Aves,Ploceidae) in Senegal |
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| Institution: | 1. Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Faculty of Sciences and Techniques, Cheikh Anta Diop University of Dakar, BP 5055 Dakar, Senegal;2. Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028 Barcelona, Spain;3. Institut de Recerca de la Biodiversitat, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain;1. Instituto de Virología “Dr. J. M. Vanella”, Facultad Ciencias Médicas, Universidad Nacional de Córdoba, Enfermera Gordillo Gomez s/n, CP 5016 Ciudad Universitaria, Córdoba, Argentina;2. Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Rafaela, Consejo Nacional de Investigaciones Científicas y Técnicas, CC 22, CP 2300 Rafaela, Santa Fe, Argentina;3. Instituto de Ambientes de Montaña y Regiones Áridas, Universidad Nacional de Chilecito, Argentina;4. Instituto de Investigaciones Biológicas y Tecnológicas CONICET-FCEFyN, UNC, 5016 Córdoba, Argentina;1. Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic;2. CEITEC VFU, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic;3. Bay Islands Foundation, Iguana Station, Utila, Islas de la Bahía, Honduras;4. Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil;5. Laboratory of Hantaviruses and Rickettsioses, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, RJ, Brazil;1. Servicio de Parasitología, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Carretera Majadahonda-Pozuelo Km 2,2, Majadahonda, 28220 Madrid, Spain;2. Department Functional and Evolutionary Ecology, Estación Experimental de Zonas Áridas – CSIC, Carretera de Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain;3. Centro de Estudios de Sistemas Marinos CENPAT-CONICET, Bvd. Almirante Brown 2915, Puerto Madryn U9120ACD, Chubut, Argentina;4. Zoología, Facultad de Ciencias, Universidad de Extremadura, Av. de Elvas s/n, 06071 Badajoz, Spain;5. Dept. Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, José Gutiérrez Abascal 2, 28006 Madrid, Spain;1. Art Unit, Drouot Laboratory, Drouot Street, Paris 75009, France;2. Bleuets Hospital, Lasson Street, Paris 75012, France;3. Diaconesses Saint Simon Hospital, Sergent Bauchard Street, Paris 75012, France;4. Trousseau Hospital, Arnold Netter Avenue, Paris 70012, France;5. Cochin Hospital, Faubourg Saint Jacques, Paris 75014, France |
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| Abstract: | The mature spermatozoon of Anomotaenia quelea exhibits an apical cone of electron-dense material and two helicoidal crest-like bodies. The apical cone near its base is surrounded by a lucent cytoplasm and a spiraled layer of cortical microtubules. The crest-like bodies are of different lengths, spiraled and make an angle of 30–40° to the hypothetical spermatozoon axis. The axoneme is of the 9 + ‘1’ trepaxonematan pattern and is surrounded by a periaxonemal sheath of electron-dense material. The cytoplasm contains in regions III and IV numerous electron-dense granules situated between the periaxonemal sheath and the cortical microtubules. The posterior extremity of the spermatozoon of A. quelea exhibits a nucleus and a disorganized axoneme and cortical microtubules. This type of posterior extremity of the mature spermatozoon has never been described previously in a Dilepididae. Similarly, two crest-like bodies have not been observed before in a dilepidid cestode. |
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| Keywords: | Sperm morphology TEM Dilepididae Apical cone Periaxonemal sheath |
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