Cytotaxonomy of the Simulium sanctipauli sub-complex in Liberia.
Larvae of the Simulium sanctipauli sub-complex from three of the main rivers of Liberia, the Lofa, the St. Paul and the Farmington were examined. All larvae were identified as S. sanctipauli (sensu Vajime and Dunbar, 1975) but as S. soubrense using the new definition of Post (1986). It therefore appears that S. soubrense (sensu Post) and not S. sanctipauli is the main man-biting species of the S. sanctipauli sub-complex in Liberia. Larval populations from the three rivers were genetically distinct. Those from the Lofa and St. Paul were most closely related, but the double inversion 1L-B.C. which was in Hardy-Weinberg equilibrium in the Lofa at a frequency of 0.578 was absent in the St. Paul. An abrupt genetical change was observed between the populations of the St. Paul and Farmington, which are only about 30 to 40 km away from each other. The inversion 2L-D, which was fixed and present in more than 90% of specimens from the Lofa and St. Paul respectively, was practically absent in the Farmington. Of further interest was the sex-linkage of inversion 3L-5 in the Lofa and the St. Paul. This inversion was autosomal and rare in the Farmington.
Bernhard-Nocht-Institut für Schiffs- und Tropenkrankheiten, Hamburg.
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Kashan
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Garms
D000818:Animals; D007446:Chromosome Inversion; D005260:Female; D005618:Fresh Water; D008040:Genetic Linkage; D007303:Insect Vectors / Q000145:classification* / Q000235:genetics; D007621:Karyotyping; D007814:Larva; D007988:Liberia; D008297:Male; D011110:Polymorphism, Genetic; D012843:Simuliidae / Q000145:classification* / Q000235:genetics