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The Nemertodermatida are a small group of microscopic marine worms. Recent molecular studies have demonstrated that they are likely to be the earliest extant bilaterian animals. What was the nervous system (NS) of a bilaterian ancestor like? In order to answer that question, the NS of Nemertoderma westbladi was investigated by means of indirect immunofluorescence technique and confocal scanning laser...
In order to broaden the information about the organisation of the nervous system in the Plathelminthes, an immunocytochemical (ICC) study of the free-living flatworm Castrella truncata (Dalyellioida) has been performed. This is the first time a representative of the taxon Rhabdocoela has been studied with the ICC technique. Antibodies to 5-HT and FMRF-amide and confocal scanning laser microscope were...
In order to solve the problem of whether the Acoela have a brain of a common flatworm type, an immunocytochemical study was performed of the pattern of FMRF-amide in the nervous system of four species of Acoela, Anaperus biaculeatus, Childia groenlandica, Actinoposthia beklemischevi and Mecynostomum sp. In all species a FMRF-amide positive bilobed brain-like structure lacking neuropile was observed...
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