Amegilla maderae (Sichel, 1868)

Amegilla maderae View in CoL versus A. quadrifasciata

Amegilla maderae is markedly larger in female body characters than A. quadrifasciata for the following variables: body length (BL; p <0.0001), metasoma length (MTL; p <0.0001), and metasoma width (MTW; p <0.0001), scutum-scutellum length (SCL; p = 0.0081) and scutum width including tegulae (TSCW; p = 0.003), and weakly different in wing length (WL; p = 0.025). In males, only three variables are significantly larger in A. maderae : scutum width including tegulae (TSCW; p = 0.00063), metasoma length (MTL; p = 0.026) and scutum-scutellum length (SCL; p = 0.0016).

The regression lines between the first shape PC and the isosize axis are clearly separated in both sexes ( Figure 4 View FIGURE 4 ). The PCA ratio spectrum separating the two species is documented in females by the ratio of eye length/interocular upper distance (EL/IDU) to labrum length/scutum-scutellum length (LL/SCL) and in males by the ratio of eye width/scutum-scutellum length (EW/SCL) to interocular lower distance/labrum width (IDL/LW).

The variables flagellomere 2 (FL2) and proximal length of the submarginal cell (CU2a) in females and in males are responsible for the differentiation of the shape PC1.