Cytotaxonomic comparisons
A total of 172 larvae were cytologically examined. The
polytene chromosomes of our samples were identical to the
chromosome map of S. angulistylum reported by Kuvangkadilok
et al. (2003), although chromosomes II and III in that
paper were reversed. The chromosome landmarks (double
bubble and ring of Balbiani) on the short arm of chromosome
II were also in the same positions as previously reported
by Phasuk et al. (2005).