Cytogenetic Evidence for a Fifth Species Within the Taxon Anopheles Dirus in Thailand
WALTER REED BIOSYSTEMATICS UNIT WASHINGTON DC
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Crossbreeding and chromosomal evidence are presented for the existence of a fifth sibling species within the taxon of Anopheles dirus in Thailand. The new species is morphologically identifiable as Anopheles balabacensis Frasers Hill form. Structural differences in mitotic chromosomes and extensive asynapsis in hybrid polytene chromosomes indicate that significant genetic divergence exists between this species and its closest relatives, An. dirus species A, B, C and D and An. balabacensis.