FIGURE 2 in The neotropical stingless bee genus Nannotrigona Cockerell (Hymenoptera: Apidae: Meliponini): An illustrated key, notes on the types, and designation of lectotypes

FIGURE 2. Key couplet features of Nannotrigona species: A. N. schultzei (KU1381942, Bolivia, El Beni), sparsely punctate mesoscutum. B. N. perilampoides (KU1382363, Mexico, Oaxaca), mesoscutum densely and coarsely foveate. C. N. dutrae (Paralectotype), strongly carinate omaulus. D. N. perilampoides (KU1382363, Mex, Oaxaca), setae on scape shorter than scape diameter. E. N. mellaria, setae on scape about as long as scape diameter.