Nannotrigona
Creators: name: Rasmussen, Claus
name: Gonzalez, Victor H.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Nannotrigona

description: Key to the species of Nannotrigona (workers)
1. Mesoscutum sparsely punctate, shiny among punctures (Fig. 2 A, C); smaller species, head width <1.6 mm, mesoscutum width <1.3 mm ................................................................................(dutrae group) 2
- Mesoscutum and mesoscutellum densely and coarsely foveate with depressions enclosed by ridgelike elevations, giving foveae a rugulose appearance (Fig. 2 B); larger species, head width> 1.6 mm, mesoscutum width> 1.3 mm ....................3
2(1). Omaulus rounded; clypeus and paraocular area distinctly pubescent (Fig. 7 B); posterior margin of mesoscutellum and outer surfaces of fore- and mesotibiae with long setae (> diameter of F3); head more than 1.2 times as broad as long.... N. schultzei
- Omaulus strongly carinate (Fig. 2 C); clypeus and paraocular area with smooth and largely glabrous areas (Fig. 7 A); posterior margin of mesoscutellum and outer surfaces of fore- and mesotibiae largely asetose; head less than 1.2 times as broad as long............................................................................................. N. dutrae
3(1). Base of antennal scape with long setae, at least as long as diameter of scape (Fig. 2 E).................. (mellaria group) 4
- Base of antennal scape covered with appressed or erect setae, much shorter than diameter of scape (Fig. 2 D)................................................................................................(testaceicornis group) 7
4(3). Posterior margin of mesoscutellum with deep and semicircular emargination (Fig. 3 A); depth of emargination, as measured from an imaginary line between apices of teeth to its base, 1.2 times greater than diameter of F3; forewing length, including tegula, approximately 5.0 mm............................................................................5
- Posterior margin of mesoscutellum with shallower emargination (Fig. 3 B); depth of emargination at most 0.5 times diameter of F3; forewing length, including tegula, approximately 4.5 mm ...................................................6
5(4). Tessellation of T2 and T3 without glabrous intersections, giving the surface a matte appearance; mesoscutellum 1.5 times broader than long; legs brown or darker; maculations bright yellow, including on axillae, lateral border of mesoscutum, and apical teeth of mesoscutellum.................................................................... N. mellaria
- Tessellation of T2 and T3 with glabrous intersections, almost shiny; mesoscutellum less than 1.5 times broader than long; legs ferruginous; maculations reduced or faint yellow, including on axillae, lateral border of mesoscutum, and apical teeth of mesoscutellum................................................................................ N. tristella
6(4). Base of antennal scape with setae less than 1.3 times longer than the diameter of scape; flagellar segments usually testaceous........................................................................................... N. chapadana
- Base of antennal scape with longest setae at least 1.7 times longer than the diameter of scape; flagellar segments usually brown......................................................................................... N. melanocera
7(3). Ocellocular area, between lateral ocellus and inner margin of compound eye, with contiguous punctures similar to those on frons (Fig. 3 C); carina of pronotal lobe, in dorsal view, not projecting into an angle................................ 8
- Ocellocular area, between lateral ocellus and inner margin of compound eye, with scattered and larger punctures than on frons (Fig. 3 D); carina of pronotal lobe, in dorsal view, projecting into an angle.........................................9
8(7). Wing membrane, veins and pterostigma light reddish brown contrasting with wing apex dark grayish brown; posterior margin of mesoscutellum with deep, semicircular emargination, about 1.8 times broader than long............. N. camargoi n. sp.
- Wings brownish, veins and pterostigma dark brown; posterior margin of mesoscutellum with shallower emargination, about 3.8 times broader than long................................................................. N. perilampoides
9(7). Clypeus shiny, with minute shallow punctures (Fig. 3 F); antennal flagellum blackish to brownish.............. N. punctata
- Clypeus duller, with minute, coarse punctures (Fig. 3 E); antennal flagellum light reddish brown.......... N. testaceicornis Trigona dutrae Friese, 1901: 267 [lectotype: ZMHB; worker, Pará, Brazil] new lectotype designation
description: Published as part of Rasmussen, Claus & Gonzalez, Victor H., 2017, The neotropical stingless bee genus Nannotrigona Cockerell (Hymenoptera: Apidae: Meliponini): An illustrated key, notes on the types, and designation of lectotypes, pp. 191-220 in Zootaxa 4299 (2) on page 195, DOI: 10.11646/zootaxa.4299.2.2, http://zenodo.org/record/839357