On the genus Gastrodynerus Bohart, 1984 (Hymenoptera: Vespidae: Eumeninae) Author Grandinete, Yuri Campanholo Author Cortes, Gustavo Bellini Author Carpenter, James Michael text Zootaxa 2019 2019-09-17 4671 2 240 250 journal article 25517 10.11646/zootaxa.4671.2.4 8214b5e5-1f17-4d4b-93eb-e7e0c383ab6e 1175-5326 3442386 4B5A3D7E-0E88-4BC3-BF88-D6A938FE09A1 Key to species of Gastrodynerus Bohart, 1984 1. T2 strongly reflexed at apex ( Fig. 2 ); digitus long, narrower at the base ( Figs 22–25 )................................ 2 1’. T2 not reflexed at apex, or weakly reflexed ( Fig. 3 ); digitus shorter, broader at the base ( Figs 26–28 )................... 3 2. Vertex with strong polished postocellar tubercles ( Fig. 9 ); interocellar region elevated, forming two small tubercles adjacent to lateral ocelli; distal lobe of paramere with few erect short bristles (male genitalia, Figure 22 ).......................................................................... Gastrodynerus vanduzeei (Bohart, 1948) ( U. S. A. and Mexico ) 2’. Vertex with weak protuberances, but not polished tubercles ( Fig. 10 ); interocellar region not elevated, without small tubercles adjacent to the lateral ocelli; distal lobe with more erect short bristles (male genitalia, Figure 23 )..................................................................................... Gastrodynerus stangei Bohart, 1984 ( Mexico ) 3. S3 with strong and deep punctures, some bigger than ocelli ( Fig. 13 )............................................ 4 3’. S3 with strong, but sparse punctures, never bigger than ocelli ( Fig. 14 )........................................... 5 4. Punctation of clypeus more evident, deeper, homogeneously distributed; humeral region weakly projected (more evident in males); T1 with coarse punctures that are clearly separated from each other (easiest to observe in dorsal view) ( Fig. 17 ); base of digitus with erect and sparse bristles (male genitalia, Figure 25 ). Gastrodynerus tacubayae (de Saussure, 1857) ( Mexico ) 4’. Punctation of clypeus weaker, smooth, more evident at superior portion; humeral region more projected (more evident in males); T1 with coarser, wider and reticulated punctures (easier to observe in dorsal view) ( Fig. 16 ); base of digitus with tuft (denser) of erect bristles (male genitalia, Figure 24 )...................... Gastrodynerus searsi Bohart, 1984 ( Mexico ) 5 Dorsal surface of propodeum with coarse, wide and reticulated punctures (almost same size as ocelli) ( Fig. 11 ); male unknown............................. Gastrodynerus guatemalensis Grandinete & Carpenter , sp. nov. ( Guatemala ) 5’ Dorsal surface of propodeum with coarse punctures, clearly smaller and denser, but not reticulated ( Fig. 12 )............. 6 6. Basal portion of T1 with strong (wider on lateral surfaces) reticulate punctures, becoming slightly separate towards apex ( Fig. 18 ). Males: When compared to females, the punctures on T1 even stronger and wider, becoming smaller (although still reticulate) towards apex; digitus very short, scarcely surpassing the distal lobe (male genitalia, Figure 27 )...................................................... Gastrodynerus barretti Grandinete & Cortes , sp. nov. ( Bolivia , Colombia , Peru ) 6’. Punctures of T1 smaller, not reticulate, homogeneously distributed ( Fig. 19 ); digitus longer, clearly surpassing the distal lobe (male genitalia, Figures 26 and 27 )....................................................................... 7 7. T1 with strong and close punctures ( Fig. 19 ); T2 with lateral margins (in dorsal view) more convex ( Fig. 21 ); same tergum with weak, shallow and clearly separate punctures, becoming stronger and close to each other on pre-apical region ( Fig. 21 ); male genitalia in Figure 28 ................................. Gastrodynerus aimara Grandinete & Cortes, 2019 ( Bolivia ) 7’. Punctures on T1 weaker and homogeneously distributed ( Fig. 15 ); T2 with lateral margins (in dorsal view) weakly convex, almost parallel ( Fig. 20 ); with weak and shallow punctures towards pre-apical region ( Fig. 20 ); male genitalia in Figure 26 ........................................... Gastrodynerus yungaensis Grandinete & Carpenter, 2019 ( Argentina )