Ultrastructure of the sperm of Dolania americana Edmunds and Traver (Ephemeroptera : Behningiidae) |
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| Institution: | 1. LMU Munich, Department Biology II, Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany;2. Senckenberg Research Institute and Natural History Museum, Department of Marine Zoology, Senckenberganlage 25, 60325 Frankfurt am Main, Germany;3. SNSB-Bavarian State Collection of Zoology, Münchhausenstr.21, 81247 Munich, Germany;1. Laboratory of Soil Biodiversity, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, Neuchâtel CH-2000, Switzerland;2. Real Jardín Botánico, CSIC, Plaza de Murillo 2, Madrid 28014, Spain;3. Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branisovska 31, Ceske Budejovice 37005 Czech Republic;4. Jardin Botanique de Neuchâtel, Chemin du Perthuis-du-Sault 58, Neuchâtel CH-2000, Switzerland;5. Department of Zoology, Institute of Biosciences, University of São Paulo, Brazil;1. Institute of Clinical Sciences, Imperial College London, Du Cane Road, London W120NN, UK;2. MRC London Institute of Medical Sciences, Du Cane Road, London W12 0NN, UK;3. Department of Life Sciences, Imperial College London, London SW7 2AZ, UK;4. Institute of Pharmaceutical Science, King''s College London, London SE1 9NH, UK;1. Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy, University of Gothenburg, S-41345 Gothenburg, Sweden;2. The Faculty of Science, Department of Chemistry and Molecular Biology, University of Gothenburg, 40530 Gothenburg, Sweden;3. Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London WC1N3BG, United Kingdom;1. Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9050, USA;2. Department of Biophysics and Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8816, USA;1. School of Biosciences, The University of Melbourne, Melbourne, VIC, Australia;2. Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Burwood, VIC, Australia |
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| Abstract: | The ultrastructure of the mature sperm of the mayfly, Dolania americana Edmunds and Traver (Ephemeroptera : Behningiidae), is described from scanning and transmission electron microscopy. The head is 0.7–1 μm wide and 4.6–6.9 μm long, rodlike, and topped by a short, rounded acrosome 0.4 μm long and 0.6 μm wide. The flagellum is 5–6 times the head length and is flattened, except for a thin, tubelike terminal portion. The axoneme pattern is 9-9-1 (9 outer singlet microtubules, 9 doublet microtubules, and a central dark element) and is new for Ephemeroptera. The inner dynein arms are conspicuous and outer arms are lacking, and radial spokes and a central sheath are prominent. A densely-staining and bi-lobed accessory body lies adjacent to the axoneme. A mitochondrial derivative with regularly arranged transverse-to-oblique cristae lies adjacent to the accessory body. |
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