Nannotrigona chapadana ( Schwarz, 1938 )

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, Zootaxa 4299 (2), pp. 191-220 : 200-202

Nannotrigona chapadana ( Schwarz, 1938)

Figures 5 A, 6C, 7C, 9A,B, 11C

Trigona (Nannotrigona) testaceicornis chapadana Schwarz, 1938: 487 [holotype: whereabouts unknown]

Diagnosis. This species is morphologically very similar to that of N. melanocera from which it can be distinguished by the shorter setae on the antennal scape and the testaceous coloration of the antennal flagellum.

Morphology. Paratype worker: Total body length (not possible to measure); head width 1.96 mm; maximum width of mesoscutum 1.41 mm; forewing length (including tegula) 4.5 mm. Head 1.2 times wider than long; malar area about 0.6 times width of F3; clypeus about 1.6 times broader than long; intertorular distance 1.4 times torular diameter; torulorbital distance 1.6 times torular diameter; interocellar distance 2.5 times OD, 1.1 times longer than ocellocular distance; ocelloccipital distance 2.3 long as OD; scape 4.5 times longer than wide, 1.1 times width of F3; flagellomeres broader than long, except apical flagellomere longer than broad. Mesoscutellum 1.6 times broader than long, basal fovea U-shaped, longer than broad, posterior margin with median emargination, semicircular, about 3.0 times broader than long, tooth lateral to emargination right-angled. Measurements of other structures in Table 3.

N. N. N. N.

chapadana melanocera mellaria tristella Paratype Holotype Lectotype Holotype

Total length of body — 4.35 — 4.80 Width of head 1.96 1.79 2.01 2.01 Length of head (clypeal apex-vertex) 1.67 1.62 1.79 1.79 Length of compound eye 1.27 1.24 1.46 1.43 Width of compound eye 0.54 0.47 0.60 0.58 Upper interocular distance 1.19 1.10 1.20 1.21 Maximum interocular distance 1.33 1.33 1.41 1.39 Lower interocular distance 0.95 0.94 1.00 1.02 Diameter of median ocellus 0.13 0.13 0.14 0.13 Interocellar distance 0.34 0.30 0.34 0.34 Ocellocular (ocellorbital) distance 0.30 0.28 0.25 0.28 Ocelloccipital distance 0.30 0.28 0.25 0.28 Intertorular (interalveolar) distance 0.24 0.20 0.24 0.23 Torulorbital (alveolorbital) distance 0.26 0.25 0.29 0.26 Torulocellar (alveolocellar) distance 0.82 0.80 0.72 0.79 Torular (alveolar) diameter 0.17 0.12 0.19 0.20 Length of clypeus 0.48 0.53 0.46 0.50 Maximum width of clypeus 0.77 0.74 0.86 0.89 Intertentorial distance, width of clypeus 0.54 0.54 0.60 0.58 Clypeocellar distance 1.07 1.12 1.18 1.31 Length of malar space 0.07 0.06 0.06 0.06 Length of scape 0.65 0.65 0.72 0.72 Diameter of scape 0.14 0.13 0.13 0.16 Diameter of third flagellomere 0.13 0.14 0.11 0.11 Length of pedicel + flagellomeres — 1.21 — 1.58 Length of first flagellomere 0.12 0.12 0.12 0.12 Length of second flagellomere 0.10 0.10 0.10 0.10 Length of third flagellomere 0.12 0.11 0.11 0.12 Length of forewing (excl. tegula) 3.95 4.00 4.40 4.55 Length of forewing (incl. tegula) 4.45 4.45 5.05 5.05 Width of forewing 1.63 1.52 1.74 1.74 Length of pterostigma 0.58 0.58 0.65 0.60 Width of pterostigma 0.14 0.13 0.17 0.18 Length of marginal cell 1.15 1.14 1.25 1.25

......continued on the next page N. N. N. N. chapadana melanocera mellaria tristella Paratype Holotype Lectotype Holotype Color black, except as follows: light brown on apical two-thirds of mandible; brown on antennal scape; flagellum light brown; bright yellow on lateral margin of mesoscutum, axilla, lateral tooth of posterior margin of mesoscutellum, outer surfaces of pro- and mesotibiae basally, posterior margin of metatibia, except apical half; dark brown on distitarsi, and anterior and posterior margins of metabasitarsus. Wing membrane, veins and pterostigma dark brown.

Pubescence white, except basitarsus golden brown. Antennal scape with simple, long (equal to diameter of scape) setae along its inner margin.

Clypeus and supraclypeal area with minute, shallow punctures; frons with contigous, coarse punctures as on ocellocular area. Mesoscutum and mesoscutellum densely and coarsely foveate.

Provenance. The primary type specimen and multiple paratype specimens were collected by Herbert Huntington Smith (1851–1919) near Santa Anna da Chapada , now Chapada dos Guimarães ( Paynter & Traylor , 1991), in the state of Mato Grosso, Brazil [15.46° S, 55.75° W]. Smith was an American naturalist who deposited insect specimens from his extensive travels in multiple collections, including ANSP, where Schwarz subsequently located, identified, and described this particular species.

Type material examined. 3 paratype workers from Brazil, “Jan.” [ January ] (one as “Feb.” [ February ]), “ Chapada ”, “ PARATYPE ” (red), “ Trigona o / ( Nannotrigona ) / testaceicornis / chapadana / H.F. Schwarz ” ( ANSP). The holotype could not be located in ANSP where it was deposited according to Schwarz (1938). Additional paratype specimens in USNM and AMNH not examined.

Distribution. Brazil (Goiás, Mato Grosso); Peru (Ucayali).

Figures

FIGURE 5. Dorsal view of Nannotrigona species: A. N. chapadana (paratype, Brazil), B. N. melanocera (holotype, Bolivia). C. N. mellaria (lectotype, Panama). D. N. tristella (holotype, Venezuela). E. N. perilampoides (lectotype, Mexico). F. N. punctata (lectotype, Brazil). G. N. testaceicornis (lectotype, Brazil). H. N. camargoi n. sp. (holotype, Ecuador). Not to scale.