A new cytotype of Simulium squamosum from south-west Cameroon |
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| Authors: | Mustapha M Post R J Enyong P Lines J |
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| Institution: | Department of Entomology, The Natural History Museum, London, UK. |
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| Abstract: | A new cytotype of Simulium squamosum Enderlein (Diptera: Simuliidae) (here named S. squamosum'D') is described from around Mount Cameroon in south-west Cameroon on the basis of sex-chromosome differences on the short arm of chromosome I. Two polymorphic inversions, IS-To (a new inversion) and IS-2, are partially Y linked. These inversions usually occur together, although IS-To has a higher frequency and is more strongly Y linked than IS-2. This sex-chromosome system has not been previously described and the occurrence and evolution of sex-chromosome systems in S. squamosum is discussed. |
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| Keywords: | Simuliidae Simulium damnosum complex S squamosum onchocerciasis sex chromosomes sibling species Cameroon |
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