Ultrastructure of the flagellar apparatus of Oxyrrhis marina |
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| Authors: | Monique Cachon Jacky Cosson Marie-Paule Cosson Philippe Huitorel Jean Cachon |
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| Institution: | 1. ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, QLD 4811, Australia;2. Harvey Mudd College, Biology Department, 1250 N. Dartmouth Ave., Claremont, CA 91711, USA;3. Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington DC 20560, USA;4. Biodiversity and Geosciences Program, Museum of Tropical Queensland, Queensland Museum, Townsville, QLD 4810, Australia;5. Division of Vertebrate Zoology, Yale Peabody Museum of Natural History, 170 Whitney Avenue, New Haven, CT 06520, USA;6. Marine Science Department, Faculty of Marine and Fisheries, Syiah Kuala University, Banda Aceh, Aceh, Indonesia;7. Molecular & Cell Biology, College of Public Health, Medical & Vet Sciences, James Cook University, Townsville, QLD 4811, Australia |
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| Abstract: | Summary— Oxyrrhis marina, like all dinoflagellates, possesses one transverse and one longitudinal flagellum, which show structural differences. The transverse flagellum contains a small fibre, 20 nm in diameter, associated with doublet no.7, whereas the longitudinal flagellum is substantially by a large (200–300 nm) hollows structure closely resembling the paraflagellar rod described by several authors in kinetoplastidae and in euglenoids. This structure is made up of a hemicylindrical network of filaments which are often linked on one side to the outer doublet no. 4, and on the other side to a dense plate. Another thinner filamentous network closes this hemicyclinder. In cross-section, the wall of this structure is made up of 8 filaments 2–4 nm in diameter that show a thicker periodic structure. In longitudinal section the same filaments appear arranged in periodic rhombus meshes or a helicoidal pattern, depending on the orientation of the section relative to the axoneme. |
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| Keywords: | flagellar ultrastructure paraflagellar rod 2– 4-nm filament |
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