Neotropical Meliponini: the genus Celetrigona Moure (Hymenoptera: Apidae, Apinae) Author Camargo, João M. F. Author Pedro, Silvia R. M. text Zootaxa 2009 2155 37 54 journal article 10.5281/zenodo.188869 39f685f7-2aee-4320-827b-6fe50a963450 1175-5326 188869 Key to the species of Celetrigona , workers 1 Basal half of scape with 3–7 robust, erect bristles, very long, 2.6–4.3x scape diameter or more ( Fig. 7 ); on pedicel and fl.1 erect bristles short, no longer than 1.5x fl.3 diameter (Acre, Brazil , San Martin, Peru , Fig. 16 )...................... .................................................................................................................................................... C. euclydiana sp. nov . - Basal half of scape with slender bristles, shorter than or equal to scape diameter; if longer, only 1–3 bristles just on base of scape, no longer than 2.3x scape diameter. Variable on pedicel and fl.1 ( Figs. 5, 6, 8 )................................... 2 2 Bristles on posterior surface of fl.1 longer, about 2.5–4.5x fl.3 diameter ( Fig. 8 ), following flagellomeres with a sequence of long erect bristles to progressively shorter, aligned ( Fig. 9 ) (Rondônia, southwestern Amazonas, Fig. 16 ) ............................................................................................................................................ C. hirsuticornis sp. nov . - Bristles on fl.1 shorter, no longer than 0.8–2.0x fl.3 diameter; erect bristles on following flagellomeres shorter than fl.3 diameter, approximately of uniform length ............................................................................................................ 3 3 Erect bristles on apical half of scape scarce, shorter than or equal to those on basal half ( Fig. 5 ); no modified bristles on apex of scape (southern Amazon to Central Brazil , Peru and Bolivia , Fig. 16 ) .......... C. longicornis ( Friese, 1903 ) - Erect bristles on apical half of scape abundant, as long as or longer than on basal half; some recurved bristles on apex of scape ( Fig. 6 ) (northern Amazon to Guiana and French Guiana , Fig. 16 ) ...................... C. manauara sp. nov .