Fig. 5. Micrographs of the prosternum of female representatives of apine bees, ventral view, anterior to the top. (a) Centris analis (Fabricius, 1804). (b) Euglossa cordata (Linnaeus, 1758). (c) Bombus pauloensis Friese, 1913. (d) Melipona scutellaris Latreille, 1811. (e) Apis mellifera Linnaeus, 1758. (f) Schematic representation depicting the general anatomy and relative positions of the elements of the complex of the propectus. Solid arrow indicates the prosternum in ventral view. Arrowheads indicate morphological conditions coded as character states. Scale bars: 0.1 mm.