Comparative morphometry and morphology of Anopheles aconitus Form B and C eggs under scanning electron microscope

Comparative morphometric and morphological studies of eggs under scanning electron microscope (SEM) were undertaken in the three strains of two karyotypic forms of Anopheles aconitus, i.e., Form B (Chiang Mai and Phet Buri strains) and Form C (Chiang Mai and Mae Hong Son strains). Morphometric examination revealed the intraspecific variation with respect to the float width [36.77 +/- 2.30 microm (Form C: Chiang Mai strain) = 38.49 +/- 2.78 microm (Form B: Chiang Mai strain) = 39.06 +/- 2.37 microm (Form B: Phet Buri strain) > 32.40 +/- 3.52 microm (Form C: Mae Hong Son strain)] and number of posterior tubercles on deck [2.40 +/- 0.52 (Form B: Phet Buri strain) = 2.70 +/- 0.82 (Form B: Chiang Mai strain) < 3.10 +/- 0.32 (Form C: Chiang Mai strain) = 3.20 +/- 0.42 (Form C: Mae Hong Son strain)], whereas the surface topography of eggs among the three strains of two karyotypic forms were morphologically similar.