Medical and Veterinary Entomology · 2001 · 33 citations · 12 references
Life SciencesEntomologyGeneticsCytogeneticsInsect SystematicsSpeciationChromosomal SpeciationChromosome MorphologyChromosome Number VariationComparative CytogeneticsHybrid ZonesSex Chromosome CytogeneticsChromosomal RearrangementsComparative Genomic Hybridization Of Sex ChromosomesCytogenetic Analysis Of HybridsCytogenetic Evidence For SpeciationSex Chromosome Structure
On the basis of sex chromosome variation, three cytotypes of Simulium squamosum (Enderlein) (Diptera: Simuliidae) are described from Cameroon and Nigeria. Simulium squamosum A is the typical form as originally described by Vajime & Dunbar (1975) with chromosome I as the sex chromosome. It occurs throughout most of Cameroon and south-east Nigeria. A second cytotype, S. squamosum B, is described from the river Sanaga (Cameroon). It also has chromosome I as the sex chromosome, but the nature of the sex differential region is different. Simulium squamosum C has no sex-linked chromosomal rearrangements. It is widespread in Nigeria and occurs near Mount Cameroon, where it seems to hybridize with S. squamosum A.
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Ernst Mayr, M. J. D. White · Systematic Zoology · 1978 · 1.3K citations
Cytotaxonomy of Black Flies (Simuliidae)
Klaus Rothfels · Annual Review of Entomology · 1979 · 152 citations