and top/whorl portion) pattern is statistically significant Discriminant Function
Analysis (DFA) was performed. Fig. (5) graphically showed the frequency histogram
of the degree of sexual dimorphism of P. canaliculata. Illustrated in Table (4) are the
percent correctly classified data based on the discriminant function scores of the three
characters examined. Results in Table (4) have shown that there are more than 86%,
90% and 88% correctly classified discriminant function scores for both the
ventral/aperture (80% of females; 93.33% of males), dorsal view (86.67% of females;
93.33% of males) and top/whorl (96.67% of females; 80% of males). These results
indicate sexual dimorphism in P. canaliculata based on the three characters.