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Key to Simopone grandidieri group workers
This key to the workers of the Simopone grandidieri group is based on Chen, Chen and Zhou (2019).
1
- In full-face view, outer margins of eye just interrupting lateral margin of head (Figs 5–6) . . . . . 2
 Figures 5–7. Head in full-face view of the worker of Simopone spp. 5 S. elegans, type (specimen CASENT0492213; photo by Shannon Hartman, Antweb) 6 S. grandidieri, type (specimen CASENT0101842; photo by April Nobile, Antweb) 7 S. chapmani, type (specimen CASENT0173044; photo by April Nobile, Antweb). |
- In full-face view, outer margins of eye not interrupting lateral margin of head (at most toughing the lateral margin as seen in Fig. 7) . . . . . 4
2
return to couplet #1
- Frontal carina relatively short, ending far away from the level of the anterior margins of eyes; leading edge of scape without standing setae (Fig. 8) . . . . . Simopone grandidieri
- Frontal carina relatively long, extending beyond the level of the anterior margins of eye; leading edge of scape with standing setae (Fig. 9) . . . . . 3
3
return to couplet #2
- Eyes located far back on head (EP 1.90) . . . . . Simopone laevissima
- Eyes located slightly more anteriorly on head (EP 0.74–0.84) . . . . . Simopone elegans
4
return to couplet #1
- Anterior margin of clypeus with a prominent tooth at its midpoint (Fig. 10) . . . . . Simopone bakeri
- Anterior margin of clypeus broadly rounded, and without a tooth at its midpoint (Fig. 11, 12) . . . . . 5
5
return to couplet #4
- AII almost as broad as long (AIIW/AIIL 0.96) (Fig. 13) . . . . . Simopone gressitti
- AII distinctly longer than broad (AIIW/AIIL ≤ 0.86) (Fig. 14) . . . . . 6
6
return to couplet #5
- Head in full-face view distinctly trapezoidal; lateral tooth of clypeus inconspicuous (Fig. 15) . . . . . Simopone chapmani
- Head nearly rectangular in full-face view; lateral tooth of clypeus conspicuous (Fig. 16-18) . . . . . 7
 Figures 15–18. Head in full-face view of the worker of Simopone spp. 15 S. chapmani, type (AntwebCASENT0173044; photo by April Nobile, Antweb) 16 S. oculata, type (AntwebCASENT0917355; photo by Kate Martynova, Antweb) 17 S. fisheri, type (photo by Zhlin Chen) 18 S. yunnanensis type (photo by Zhlin Chen). |
7
return to couplet #5
- Large species (TL ≥ 8.0 mm); maximum diameter of eye smaller than the minimum distance between eyes; posterolateral portion of dorsal face of pronotum striate longitudinally (Fig. 19) . . . . . Simopone fisheri
- Medium-sized or small species (TL ≤ 6.5 mm); the maximum diameter of eye equal to the minimum distance between eyes; posterolateral portion of dorsal face of pronotum smooth and shining (Fig. 20, 21) . . . . . 8
8
return to couplet #7
- Medium-sized species (TL = 6.5 mm); posterior margin of head distinct concave; lateral side of 1/3 posterior head gradually convergent (Fig. 22) . . . . . Simopone yunnanensis
- Small species (TL = 5.5 mm); posterior margin of head almost straight; lateral side of 1/3 posterior head gradually divergent (Fig. 23) . . . . . Simopone oculata
