Taeniogonalos Schulz, 1906

Kumar, P. Girish & Hegde, V. D., 2023, Additions to the knowledge of Taeniogonalos Schulz, 1906 (Hymenoptera: Trigonalyidae) from India with the description of a new species from Western Ghats, Zootaxa 5361 (4), pp. 566-572 : 567

Key to Indian species of Taeniogonalos Schulz (based on females; modified from Binoy et al. 2022)

1. Second metasomal sternite produced medio-posteriorly ( Figures 5d and 5f of Binoy et al., 2022); scutellum unicoloured, yellowish orange or yellow ( Figure 5b of Binoy et al., 2022).......................... T. fulvoscutellata (Ayyar, 1919)

- Second sternite truncate medio-posteriorly ( Fig. 12 & Figures 2e, 2h , 7d, 10d, 10f, 12h and 15e of Binoy et al., 2022); scutellum bicoloured or tricoloured ( Fig. 7 & Figures 2b , 7b and 10b of Binoy et al., 2022)................................... 2

2. Head, mesosoma and metasoma predominantly bicoloured (black/blackish brown and yellow) ( Figures 6a and 11a of Binoy et al., 2022)............................................................................................ 3

- Head, mesosoma and metasoma predominantly tricoloured (red/orange, black/blackish brown and yellow/yellowish white) ( Fig. 1 & Figures 1a , 9a and 14a of Binoy et al., 2022)........................................................ 4

3. Second metasomal tergite densely punctured, interspaces distinctly less than the diameter of punctures, matt ( Figure 7e of Binoy et al., 2022); antenna black with yellow fleck on scape ( Figures 6b and 6e of Binoy et al., 2022); frons and vertex with extensive yellow areas ( Figures 6d and 6e of Binoy et al., 2022)............................. T. gestroi (Schulz, 1908)

- Second tergite not densely punctured, interspaces distinctly more than the diameter of punctures, glossy ( Figure 12g of Binoy et al., 2022); antenna entirely brown ( Figure 11b and 6e of Binoy et al., 2022); frons and vertex entirely black ( Figures 11d and 11e of Binoy et al., 2022)...................................................... T. latae Polaszek & Binoy, 2022

4. Second submarginal cell of fore wing petiolate anteriorly which is connecting with discal cell ( Figure 10c of Binoy et al., 2022)............................................................................. T. kerala (Ayyar, 1919)

- Second submarginal cell sessile anteriorly which is either connecting with discal cell at a point ( Figure 14a of Binoy et al., 2022) or distinctly forming a vertical vein ( Fig. 9 & Figure 2d of Binoy et al., 2022)................................ 5

5. Second submarginal cell of fore wing sessile anteriorly which is connecting with discal cell at a point ( Figure 14a of Binoy et al., 2022); middle of scutellum reddish ( Figure 14d of Binoy et al., 2022)................................................................................................ T. thwaitesii (Westwood, 1874) [Extralimital: Sri Lanka]

- Second submarginal cell sessile anteriorly which is connecting with discal cell by forming a vertical vein ( Fig. 9 & Figure 2d of Binoy et al., 2022); middle of scutellum black ( Fig. 7 & Figure 2b of Binoy et al., 2022).......................... 6

6. Second metasomal tergite with basal yellow spot ( Fig. 11 ); vertex dorsally reddish ( Fig. 4 ); 21 flagellomeres ( Fig. 2 ); yellow apical band of second metasomal tergite laterally widened and narrowed medially ( Fig. 11 ); yellow apical band of second metasomal sternite comparatively wide medially ( Fig. 12 )................... T. dhritiae Girish Kumar & Hegde sp. nov.

- Second tergite without basal yellow spot ( Figure 2g of Binoy et al., 2022); vertex dorsally black with reddish markings ( Figure 1d of Binoy et al., 2022); 22 flagellomeres ( Figure 1b of Binoy et al., 2022); yellowish white apical band of second tergite with almost uniform thickness ( Figure 2g of Binoy et al., 2022); yellowish white apical band of second sternite narrow medially ( Figure 2h of Binoy et al., 2022)............................. T. ayyari Binoy, van Achterberg & Girish Kumar, 2022

Figures

FIGURE 14. Habitat of Taeniogonalos dhritiae Girish Kumar & Hegde sp. nov.

FIGURES 1–5. Taeniogonalos dhritiae Girish Kumar & Hegde sp. nov. Holotype female. 1. Habitus, lateral view; 2. Antenna; 3. Head, lateral view; 4. Head, dorsal view; 5. Head, frontal view.

FIGURES 6–13. Taeniogonalos dhritiae Girish Kumar & Hegde sp. nov. Holotype female. 6. Head and mesosoma, lateral view; 7. Mesosoma, dorsal view; 8. Scutellum (posteriorly), metanotum and propodeum, dorsal view; 9. Wings; 10. Metasoma, lateral view; 11. Metasomal tergites, dorsal view; 12. Metasomal sternites, ventral view; 13. Terminal tergites and sternites, lateral view.