Polytene chromosomes of Simulium craigi (Diptera: Simuliidae).
Simulium craigi Adler and Currie is a polymorphic species based on polytene chromosome banding patterns in the long arm of chromosome III (IIIL). Three cytotypes are described based on the predominant IIIL sequences. These correspond to three broad geographic areas: cytotype 'CC' from Pennsylvania; cytotype 'AF' from Ontario and Manitoba; and cytotype 'ACF/BCF' from New Hampshire. In the absence of sympatric populations, these cytotype differences are best explained by clinal variation within a single species. The relationship of S. craigi to other described members of the S. vernum group is discussed.
Department of Biological Sciences, Brock University, St. Catharines, Ontario, Canada. hunterf@spartan.ac.brocku.ca
Fiona F
FF
Hunter
D000818:Animals; D023902:Chromosome Pairing; D002875:Chromosomes; D005260:Female; D007814:Larva / Q000235:genetics; D008297:Male; D011110:Polymorphism, Genetic; D012843:Simuliidae / Q000145:classification / Q000235:genetics*