Key to Stictoponera of China

This worker key to species of Stictoponera is based on: Chen, Z., J.E. Lattke, F. Shi, and S. Zhou. 2017. Three new species of the genus Gnamptogenys (Hymenoptera, Formicidae) from southern China with a key to the known Chinese species. Journal of Hymenoptera Research 54: 93–112 (doi: 10.3897/jhr.54.10816).

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1

• Petiolar node in lateral view low and rounded, the anterior margin curving continuously onto the dorsal margin (Fig. 29A) . . . . . 2

• Petiolar node in lateral view erect, with distinct anterior and posterior margins and a well-defined dorsal margin (Fig. 29B) . . . . . 3

Figure 29 A. S. binghamii worker, B. S. taivanensis worker.

2

return to couplet #1

• Body bicolor: head and gaster black, mesosoma orange-ferruginous; subpetiolar process polygonal to triangular with an anteroventral denticle (Fig. 30A) . . . . . Stictoponera bicolor

• Body unicolor: head, mesosoma and gaster orange-ferruginous; subpetiolar process sub-quadrate (Fig. 30B) . . . . . Stictoponera binghamii

Figure 30 A. S. bicolor worker, B. S. binghamii worker.

3

return to couplet #1

• In lateral view occipital lamella of head forming a blunt triangular denticle (Fig. 31A, B) . . . . . 4

• In lateral view occipital lamella of head absent; if present, only forming a convex posterior margin, never angular (Fig. 31C, D) . . . . . 5

Figure 31 A. S. dentihumera worker, B. S. panda worker (Cited from Lattke, 2004), C. S. taivanensis worker, D. S. sichuanensis worker (Cited from Lattke, 2004).

4

return to couplet #3

• In lateral view propodeum with short triangular denticle; subpetiolar process triangular (Fig. 32A) . . . . . Stictoponera dentihumera

• In lateral view propodeum without denticle, posterodorsal corner rounded; subpetiolar process polygonal, anteroventral corner bluntly angular, ventral margin straight, posteroventral corner acute (Fig. 32B) . . . . . Stictoponera panda

Figure 32 A. S. dentihumera worker, B. S. panda worker (Cited from Lattke, 2004).

5

return to couplet #3

• In dorsal view pronotum with a stout denticle on each humeral area (Fig. 33A) . . . . . Stictoponera sinensis

• In dorsal view pronotum without denticle (33B) . . . . . 6

Figure 33 A. G. sinensis worker (Cited from Zhou, 2001), B. Stictoponera sp. worker.

6

return to couplet #5

• In lateral view propodeum without denticle, posterodorsal corner rounded (Fig. 34A) . . . . . 7

• In lateral view propodeum with denticle (Fig. 34B) . . . . . 8

Figure 34 A. S. nanlingensis worker, B. S. taivanensis worker.

7

return to couplet #6

• In lateral view subpetiolar process triangular or cuneiform (35A); occipital lamella narrow and inconspicuous (Fig. 35C); fourth abdominalsternite is coarsely punctate . . . . . Stictoponera nanlingensis

• In lateral view subpetiolar process polygonal, anteroventral corner angular, ventral margin concave, posteroventral corner rounded (Fig. 35B); occipital lamella well developed, with thin, almost translucent lamella (Fig. 35D); fourth abdominal sternite transversely striate . . . . . Stictoponera sichuanensis

Figure 35 A, C. S. nanlingensis worker B, D. S. sichuanensis worker (Cited from Lattke, 2004).

8

return to couplet #6

• Eye medium-sized, with 7 ommatidia on maximum diameter; declivity transversely striate . . . . . Stictoponera taivanensis

• Eye small-sized, with 5 ommatidia on maximum diameter; declivity irregularly rugose . . . . . 9

9

return to couplet #8

• In lateral view petiolar node roughly subquadrate; subpetiolar process subquadrate (Fig. 36A) . . . . . Stictoponera quadrutinodules

• In lateral view petiolar node roughly trapezoidal; subpetiolar process polygonal, anteroventral corner corner acute, ventral margin straight, posteroventral bluntly angular (Fig. 36B) . . . . . Stictoponera coccina

Figure 36 A. S. quadrutinodules worker, B. S. coccina worker (Cited from Zhou, 2001).