Sex chromosome variation and cytotaxonomy of the onchocerciasis vector Simulium squamosum in Cameroon and Nigeria

M. Traore-Lamizana, S. Somiari, H. B. Mafuyai, C. G. Vajime, R. J. Post*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalMedical and Veterinary Entomology
Volume15
Issue number2
DOIs
StatePublished - 2001
Externally publishedYes

Keywords

  • Cameroon
  • Cytogenetics
  • Hybridization
  • Nigeria
  • Onchocerciasis
  • S. squamosum
  • Sex-chromosomes
  • Sibling species
  • Simulium damnosum complex
  • Taxonomy

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