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Sex chromosome variation and cytotaxonomy of the onchocerciasis vector Simulium squamosum in Cameroon and Nigeria
Author(s) -
TraoreLamizana M.,
Somiari S.,
Mafuyai H. B.,
Vajime C. G.,
Post R. J.
Publication year - 2001
Publication title -
medical and veterinary entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 82
eISSN - 1365-2915
pISSN - 0269-283X
DOI - 10.1046/j.0269-283x.2001.00300.x
Subject(s) - cytotaxonomy , onchocerciasis , biology , simulium , polytene chromosome , chromosome , vector (molecular biology) , zoology , karyotype , evolutionary biology , genetics , ecology , larva , gene , immunology , recombinant dna
. 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.