Fine structure of the egg shells of Habrophlebia fusca (curtis) and h. consiglioi Biancheri (Ephemeroptera : Leptophlebiidae) |
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| Institution: | 1. Division of Agriculture Technology, Faculty of Science and Arts, Burapha University, Chanthaburi Campus, Chanthaburi 22170, Thailand;2. Mahidol University, Amnatcharoen Campus, Amnatcharoen 37000, Thailand;3. Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand;4. Postharvest Technology Innovation Center, Commission on Higher Education, Bangkok 10400, Thailand;5. Academy of Science, The Royal Society of Thailand, Dusit, Bangkok 10300, Thailand;6. The New Zealand Institute for Plant and Food Research Ltd., Private Bag 92 169, Auckland, New Zealand;7. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA;1. INRA, UMR1347 Agroécologie, 17 rue Sully, BP 86510, F-21000 Dijon, France;2. Department Environment and Public, Health Nancy University, Hospital Hygiene Unit, 9 Avenue de la Forêt de Haye, BP154, F-54505 Vandoeuvre-Nancy Cedex, France;3. Environmental Microbiology, Plateau Technique de Biologie du CHU, 2 rue Angélique Ducoudray, BP 37013, F-21070 Dijon Cedex, France;4. Parasitology and Mycology laboratory, Plateau Technique de Biologie du CHU, 2 rue Angélique Ducoudray, BP 37013, F-21070 Dijon Cedex, France;5. Université de Bourgogne, UMR1347 Agroécologie, 17 rue Sully, BP 86510, F-21000 Dijon, France;6. Hospital Hygiene and Epidemiology unit, Hôpital du Bocage, BP 77908, F-21079 Dijon Cedex, France;1. CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands;2. Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands;3. Cellular and Molecular Research Center, Sabzevar University of Medical Sciences, Sabzevar, Iran;4. Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI), Jena, Germany;5. Peking University Health Science Center, Research Center for Medical Mycology, Beijing, China;6. Chang Zheng Hospital, Second Military Medical University, Shanghai, China;7. Basic Pathology Department, Federal University of Paraná State, Curitiba, Paraná, Brazil;8. King Abdulaziz University, Jeddah, Saudi Arabia;1. NERC Centre for Ecology & Hydrology, Wallingford, OX10 8BB, UK;2. Imperial College London, Department of Life Sciences, Silwood Park Campus, SL5 7PY, UK;3. European Centre for Environment and Human Health, University of Exeter Medical School, Knowledge Spa, Royal Cornwall Hospital, Truro, UK;4. School of Life Sciences, University of Warwick, Coventry, UK;1. National Institute of Radiological Sciences, Environmental Radiation Effects Research Group, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan;2. Toho University, Miyama 2-1-1, Funabashi, Chiba 275-8510, Japan |
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| Abstract: | The eggs of 2 mayflies, Habrophlebia fusca and H. consiglioi (Ephemeroptera : Leptophlebiidae) were observed with scanning and transmission electron microscopes. The external surface of the eggs in both species had longitudinally oriented costae. The chorion of H. fusca had different structures in its costal and intercostal zones. Three distinct layers could be recognized: an inner layer close to the vitelline coat, consisting of electron-dense lamellae perpendicular to the egg surface; an intermediate layer, consisting of loosely structured fibrillar material; and an outer highly electron-dense layer, consisting of 2 separate laminae, divided by an electron-transparent line. In the egg of H. fusca, the costal area of the chorion shows a columnar structure. The columns merge distally to create wide chambers. This organization has been observed with the SEM in H. consiglioi as well. The chambers are interconnected and communicate with the exterior through openings along the costal edges. Masses of mucus-like substance are present both in the chambers and outside the chorion; they show fibrillar material and electron-dense bodies with a paracrystalline structure. |
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