期刊
MEDICAL AND VETERINARY ENTOMOLOGY
卷 15, 期 2, 页码 219-223出版社
WILEY
DOI: 10.1046/j.0269-283x.2001.00300.x
关键词
Simulium damnosum complex; S. squamosum; cytogenetics; hybridization; onchocerciasis; sex-chromosomes; sibling species; taxonomy; Cameroon; Nigeria
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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