Trigona (Dichrotrigona) dimidiata Smith, 1854

Ribeiro, Cristiano Feitosa, Nogueira, David Silva & Oliveira, Marcio Luiz de, 2024, Taxonomic notes with update of records of Trigona (Dichrotrigona) Engel, 2021 (Hymenoptera: Apidae: Meliponini), EntomoBrasilis (e 1052) 17, pp. 1-5 : 2

Trigona (Dichrotrigona) dimidiata Smith, 1854

( Figure 2 A-D)

Trigona dimidiata Smith, 1854: 411 [original description]; Camargo et al. 2013 [catalog, geographic distribution].

Trigona atroalba Ducke, 1908: 35 [original description]; Ducke 1916: 74 [synonymy].

Diagnosis: This species is similar to T. (D.) sesquipedalis in the lower half of the glabrous and polished supraclypeal area. But differs by the following combination of traits: wings membranes and veins infuscate in the basal half, sub-marginal cell whitish; T3 with relatively short setae (0.09 mm) in the middle region, setae with about 0.5x the scape diameter; total body length approximately 8.5 mm.

Geographic distribution: Bolivia (La Paz); Brazil (Amazonas, Mato Grosso, Pará, Rondônia); Colombia (Meta); Ecuador (Morona Santiago); Peru (Huánuco, Junín, Loreto, San Martín).

Examined material: (03 workers): BRAZIL, Amazonas: Itacoatiara, Faz[enda]. Agropecuária Aruanã , 58°45’W e 3°S (-3.000000, -58.750000), 13.xi.2006 / Rede entomológica, Flores Rasteiras, C. F. Santos, Leg. / Trigona dimidiata Smith, 1854 Det. Camargo, 2007, 1 ( INPA) ; Maués, Rio Abacaxis , 05°15’09”S - 58°41’52”W (-5.252500, -58.683333) / 27-29.v.2008. J.A. Rafael e equipe, coleta manual / Trigona dimidiata Smith, 1854 , 1 ( INPA) ; Rondônia: Guajará Mirim , 10°48’S, 65°22’W (-10.800000, -65.366667) / 12-14/X/2001, Oliveira, Morato & Cunha leg., 1 ( INPA) .

Comments: This species was described by Smith (1854), as being from “ Brazil (Para)”. According to Schwarz (1948) the whereabouts of type material possibly it is the Smith collection at Oxford University.

Figures

Figure 2. Worker of Trigona (Dichrotrigona) dimidiata Smith, 1854. A-Lateral habitus. B-Head, frontal view. C-Dorsal habitus. D-Metatibia and metabasitarsus. Worker of Trigona (D.) sesquipedalis Almeida, 1984. E-Lateral habitus. F-Head, frontal view. G-Dorsal habitus. H-Metatibia and metabasitarsus. Scale bars: 1 mm.