<p><span style=\"line-height: 115%; font-family: \'Times New Roman\',\'serif\'; font-size: 12pt; mso-ansi-language: EN-US; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-theme-font: minor-latin;\" lang=\"EN-US\">Assessing the degree of variation in scale shape morphology to determine mean shape differences<span style=\"mso-spacerun: yes;\">&nbsp; </span>between the sexes of <em style=\"mso-bidi-font-style: normal;\">Leiopotheraponplumbeus</em> (Kner, 1864) population in Lake Sebu was the main objective of the study. With the advancement of statistics and computer science, a new quantitative method was utilized in the study. Landmark-based geometric morphometric method particularly Relative Warp Analysis (RWA), developed by Rohlf (2008) was used in determining the scale shape morphology between sexes of the said species. Scales were removed, cleaned, mounted and photographed via a compound microscope. Photos were converted into Thin-Plate Spline (TPS) files and processed, hereafter, in TPS package software. RWA results showed that</span><span style=\"line-height: 115%; font-family: \'TimesNewRoman\',\'serif\'; font-size: 12pt; mso-bidi-font-family: TimesNewRoman; mso-ansi-language: EN-US; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-theme-font: minor-latin;\" lang=\"EN-US\"> region A explains 87.29% of the variation as revealed in relative warps 1-5; region C explains 90.07%, region E explains 89.70%, region G explains 89.80%, region I explains 92.57% and region J explains 91.79% of the total. Relative Warp Analysis, thus </span><span style=\"line-height: 115%; font-family: \'Times New Roman\',\'serif\'; font-size: 12pt; mso-ansi-language: EN-US; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-theme-font: minor-latin;\" lang=\"EN-US\">nonetheless provides sufficient evidence of the existence of sexual dimorphism in populations of <em style=\"mso-bidi-font-style: normal;\">L. plumbeus (Kner, 1864)</em> in Lake Sebu, South Cotabato</span></p>