Gastrodynerus Bohart, 1984

Grandinete, Yuri Campanholo, Cortes, Gustavo Bellini & Carpenter, James Michael, 2019, On the genus Gastrodynerus Bohart, 1984 (Hymenoptera: Vespidae: Eumeninae), Zootaxa 4671 (2), pp. 240-250 : 241

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)

Figures

FIGURES 1–8. Habitus from species of Gastrodynerus: 1: G. vanduzeei (Holotype, female); 2: G. stangei (Holotype, male); 3: G. tacubayae (Holotype, female—photo taken by Dr. Bernard Landry—Muséum d’Histoire Naturelle de Geneve [MNHN]); 4: G. searsi (Holotype, male); 5: G. yungaensis (Holotype, female); 6: G. guatemalensis (Holotype, female); 7: G. barretti (Holotype, female); 8: G. aimara (Holotype, male). Scale bar = 1mm.

FIGURES 22–28. Male genitalia (aedeagus and paremere + volsella, respectively). 22: G. vanduzeei; 23: G. stangei; 24: G. searsi; 25: G. tacubayae; 26: G. yungaensis; 27: G. barretti; 28: G. aimara. Scale bar = 1mm.

FIGURES 9–14. 9: Vertex of G. vanduzeei with the two polished tubercles; 10: Vertex of G. stangei, with no tubercles; 11: Posterior surface of propodeum from G. guatemalensis; 12: Posterior surface of propodeum from G. barretti; 13: S3 from G. vanduzeei (Holotype, female); 14: S3 from G. guatemalensis. Scale bar = 1mm.

FIGURES 15–21. 15: T1 of G. yungaensis; 16: T1 of G. searsi; 17: T1 of G. tacubayae; 18: T1 of G. barretti; 19: T1 of G. aimara; 20: T2 of G. yungaensis; 21: T2 of G. aimara. Scale bar = 1mm.