Review of Trigona (Nostotrigona) Engel, 2021 from Brazil with description of three new species (Hymenoptera: Apidae: Meliponini) Author Ribeiro, Cristiano Feitosa 0000-0002-8831-8800 Author Nogueira, David Silva Author Oliveira, Favízia Freitas De 0000-0003-4366-5005 Author Oliveira, Marcio Luiz De 0000-0002-8831-8800 text Zootaxa 2023 2023-06-21 5306 3 349 366 http://dx.doi.org/10.11646/zootaxa.5306.3.3 journal article 10.11646/zootaxa.5306.3.3 1175-5326 8063006 23AEF023-011C-46A1-B229-47717FCA295B Key of the Trigona ( Nostotrigona ) Engel, 2021 species from Brazil (workers) 1. Face with wide distance between the epistomal suture and the lower tangent of the antennal socket of approximately 0.7× scape diameter ( Fig. 6A and D ); post-ocellar carina strongly elevated................................................. 2 – Face with narrow distance between the epistomal suture and the lower tangent of the antennal socket of approximately 0.3× scape diameter ( Fig. 6G, J and M ); post-ocellar carina short and smooth......................................... 3 2(1). Scape with erect setae approximately 0.9× scape diameter ( Fig. 6B ); metasoma elongated, approximately 2× longer than wide............................................................................ Trigona recursa Smith, 1863 . – Scape with erect setae approximately 1.3× scape diameter ( Fig. 6E ); metasoma subtriangular, approximately 1.2× longer than wide........................................................................... Trigona daianeae sp. nov. 3(1). Metabasitarsus distinctly enlarged on the apical half of the posterior margin, forming an acute angle ( Fig. 6I ); mesoscutum with long setae ( 0.26 mm ), approximately 1.9× the scape diameter; labrum slightly protuberant medially.................................................................................................... Trigona juvenili sp. nov. – Metabasitarsus with rather parallel sided, their posterior apical extremity almost rectangular to slightly produced downward ( Fig. 6L and O ); mesoscutum with relatively short setae (between 0.19 mm to 0.22 mm ), approximately 1.5× the scape diameter; labrum rounded medially............................................................................... 4 4(3). Metasoma subtriangular, approximately 1.2× longer than wide ( Fig. 7A ); upper frons with erect setae approximately 0.8× scape diameter................................................................ Trigona permodica Almeida, 1992 . – Metasoma elongated, approximately 2× longer than wide ( Fig. 7B ); upper frons with erect setae approximately 1.4× scape diameter.................................................................... Trigona mandaloriana sp. nov.