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      Two new sensory receptors in Gyrodactylus sp. (Platyhelminthes, Monogenea, Monopisthocotylea).

      Parasitology Research
      Animals, Cestoda, ultrastructure, Cilia, Mechanoreceptors, Microscopy, Electron, Photoreceptor Cells, Invertebrate, Sensory Receptor Cells

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          Abstract

          Two pairs of sub-surface ciliary aggregations, not previously described in gyrodactylid monogeneans, have been found in the antero-dorsal region of adult Gyrodactylus sp. One pair lies more anteriorly and has several basal bodies without rootlets as well as modified cilia with single microtubules projecting into an extra-cellular cavity. A neuronal process extends posteriad. An anterior pocket connecting to this cavity is surrounded by cytoplasm that adjoins the ciliated cell by a septate junction. This type may have a pressure/contact or photoreceptoral function. Each of the second pair of receptors contains approximately 12 basal bodies without rootlets in the periphery of a cytoplasmic cavity. Flattened ciliary membranes extend from the basal bodies into the interior, forming a number of whirls. A neuronal projection extends posteriad. This structure closely resembles presumed photoreceptors found in several other parasitic and free-living platyhelminths. The first type does not appear to have been described for any other species.

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          Journal
          7971933
          10.1007/BF00932385

          Chemistry
          Animals,Cestoda,ultrastructure,Cilia,Mechanoreceptors,Microscopy, Electron,Photoreceptor Cells, Invertebrate,Sensory Receptor Cells

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