Key to Simopone grandidieri group workers

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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
Simopone grandidieri casent0101842 head 1.jpg
Simopone grandidieri casent0101842 profile 1.jpg
  • Frontal carina relatively long, extending beyond the level of the anterior margins of eye; leading edge of scape with standing setae (Fig. 9) . . . . . 3
Figures 8–9. Head in full-face view of the worker of Simopone spp. 8 S. grandidieri, type (AntwebCASENT0101842; photo by April Nobile, Antweb) 9 S. elegans type (AntwebCASENT0492213; photo by Shannon Hartman, Antweb).

3

return to couplet #2

  • Eyes located slightly more anteriorly on head (EP 0.74–0.84) . . . . . Simopone elegans
Simopone elegans casent0492213 h 1 high.jpg
Simopone elegans casent0492213 p 1 high.jpg

4

return to couplet #1

  • Anterior margin of clypeus with a prominent tooth at its midpoint (Fig. 10) . . . . . Simopone bakeri
Simopone bakeri casent0173045 head 1.jpg
Simopone bakeri casent0173045 profile 1.jpg
  • Anterior margin of clypeus broadly rounded, and without a tooth at its midpoint (Fig. 11, 12) . . . . . 5
Figures 10–12. Head in full-face view 10 S. bakeri gyne (AntwebCASENT0173045; photo by April Nobile, Antweb) 11 S. chapmani type (AntwebCASENT0173044; photo by April Nobile, Antweb) 12 S. gressitti type (AntwebCASENT0249114; photo by Ryan Perry, Antweb).

5

return to couplet #4

Simopone gressitti casent0249114 h 1 high.jpg
Simopone gressitti casent0249114 p 1 high.jpg
  • AII distinctly longer than broad (AIIW/AIIL ≤ 0.86) (Fig. 14) . . . . . 6
Figures 13, 14. Petiole (AII) in dorsal view of the worker of Simopone spp. 13 S. gressitti, type (AntwebCASENT0249114; photo by Ryan Perry, Antweb) 14 S. chapmani, type (AntwebCASENT0173044; photo by April Nobile, Antweb).

6

return to couplet #5

  • Head in full-face view distinctly trapezoidal; lateral tooth of clypeus inconspicuous (Fig. 15) . . . . . Simopone chapmani
Simopone chapmani casent0173044 head 1.jpg
Simopone chapmani casent0173044 profile 1.jpg
  • 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
Chen et al 2019 F1.jpg
Chen et al 2019 F4.jpg
  • 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
Figures 19–21. Mesosoma in dorsal view of the worker of Simopone spp. 19 S. fisheri, type (photo by Zhlin Chen) 20 S. yunnanensis, type (photo by Zhlin Chen) 21 S. oculata, type (AntwebCASENT0917355; photo by Kate Martynova, Antweb).

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
Figures 22–23. Head in full-face view of the worker of Simopone spp. 22 S. yunnanensis, type (photo by Zhlin Chen) 23 S. oculata, type (AntwebCASENT0917355; photo by Kate Martynova, Antweb).
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
Simopone oculata casent0139634 h 1 high.jpg
Simopone oculata casent0139634 p 1 high.jpg

References