Key to Tetraponera of China

Every Ant Tells a Story - And Scientists Explain Their Stories Here
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This worker key is based on: Xu, Z.-H, and Chai, Z.-Q. 2004. Systematic study on the ant genus Tetraponera F. Smith (Hymenoptera, Formicidae) of China. Acta Zootaxonomica Sinica 29(1): 63-76 PDF

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1

  • Head with three distinct ocelli. Mandible with 5 teeth on the masticatory margin. Anteroventral corner of petiole distinctly dentate (rufonigra-group) . . . . . 2
  • Head lacking ocelli. Mandible with 3-4 teeth on the masticatory margin. Anteroventral corner of petiole not dentate . . . . . 3

2

return to couplet #1

  • Median lobe of clypeus longer and narrower, anterior margin straight or weakly convex. In dorsal view, humeral corners of pronotum sharply angled at most 90°. Anteroventral tooth of petiole acute. Pronotum color orange and concolor with alitrunk (China: Yunnan and Hainan Provinces; Pakistan to Southern China, South to Sumatra and Java, and introduced into the Seychelles) . . . . . Tetraponera rufonigra
Tetraponera rufonigra casent0106099 head 1.jpg
Tetraponera rufonigra casent0106099 profile 1.jpg
  • Median lobe of clypeus shorter and broader, anterior margin weakly but distinctly concave. In dorsal view, humeral corners of pronotum bluntly angled and distinctly more than 90°. Anteroventral tooth or petiole blunt. Pronotum color black in contrast to the orange alitrunk (China: Yunnan Province) . . . . . Tetraponera concava
Xu and Chai 2004 concava sp nov head worker.png
Xu and Chai 2004 concava sp nov body worker.png

3

return to couplet #1

  • Mandible robust, with four teeth on the masticatory margin, and 0-1 denticle on the basal margin. Basal margin of mandible subequal to, or shorter than, masticatory margin (nigra-group) . . . . . 4
  • Mandible slender, with three teeth on the masticatory margin, and 1-2 denticles on the basal margin. Basal margin of' mandible much longer than masticatory margin (allaborans-group) . . . . . 7

4

return to couplet #3

  • Standing pilosity on the head abundant, cephalic setal count 10-40. Pronotum lacking lateral margins. In profile view, petiole lacking a pair of posteroventral teeth . . . . . 5
  • Standing pilosity on the head very sparse, cephalic setal count 0-4. Pronotum distinctly marginate laterally. In profile view, petiole with a pair of acute posteroventral teeth, formed from ventrolateral extensions of the petiolar sternite . . . . . 6

5

return to couplet #4

  • Head trapezoid and widened forward. Median lobe or clypeus broad and protruding, anterior margin with 5 blunt denticles (China: Yunnan Province, Guangxi Region, Hong Kong; India and Nepal, East to Southern China, South to West Malaysia) . . . . . Tetraponera binghami
Tetraponera binghami casent0281873 h 1 high.jpg
Tetraponera binghami casent0281873 p 1 high.jpg
  • Head rectangular and slightly narrowed forward. Median lobe or clypeus narrow and very short, anterior margin entire and without denticles (China: Yunnan, Guangdong, Hainan and Taiwan Provinces, Guangxi Region, Hong Kong: North-east India to China, South to Sumatra, Java, Borneo and Palawan) . . . . . Tetraponera attenuata
Tetraponera-attenuataH5x.jpg
Tetraponera-attenuataL2.5x.jpg

6

return to couplet #4

  • Head elongate with CI 73-77. Occipital margin straight. Lateral sides of pronotum bluntly marginate. Petiole very slender with PLI 43-49 (China: Yunnan Province; Thailand; West Malaysia) . . . . . Tetraponera notabilis
Tetraponera notabilis casent0902829 h 1 high.jpg
Tetraponera notabilis casent0902829 p 1 high.jpg
  • Head broader with CI 78-90. Occipital margin weakly concave. Lateral sides of pronotum sharply marginate. Petiole much shorter with PU 60-79 ( Figs.27-32) (China: Yunnan Province, Guangxi Region, Hong Kong; India to Southern China, South to Northern Australia) . . . . . Tetraponera nitida
Tetraponera nitida casent0172004 head 1.jpg
Tetraponera nitida casent0172004 profile 1.jpg

7

return to couplet #3

  • Median lobe of clypeus very short, not protruding, anterior margin straight. In profile view, pronotum strongly convex (China: Yunnan Province) . . . . . Tetraponera convexa
Tetraponera convexa casent0235339 h 1 high.jpg
Tetraponera convexa casent0235339 p 1 high.jpg
  • Median lobe of clypeus elongate and protruding, anterior margin dentate. In profile- view, pronotum weakly to moderately convex . . . . . 8

8

return to couplet #7

  • Median lobe of clypeus with a pair of teeth furnished at the anterolateral corners, anterior margin between the teeth nearly straight . . . . . 9
  • Median lobe of clypeus with 3-5 teeth along its anterior margin, sometimes the teeth may be reduced . . . . . 10

9

return to couplet #8

  • In profile view, dorsum of propodeum horizontal, not slope down backwards, posterodorsal corner of propodeum distinct which bluntly angled. Head shorter with CI 76-83. Scape shorter with SI 52-57. Petiole shorter with PLI 53-59 ( Figs. 38-42) (China: Jiangxi and Guangdong Provinces, Guangxi Region, Hong Kong; Vietnam) . . . . . Tetraponera microcarpa
  • In profile view, dorsum of propodeum oblique and slope down backwards, posterodorsal corner of propodeum indistinct and rounded. Head longer with CI 71-77. Scape longer with SI 60-65. Petiole longer with PLI 43-45 (China: Yunnan Province) . . . . . Tetraponera furcata
Xu and Chai 2004 furcata sp nov head worker.png
Xu and Chai 2004 furcata sp nov body worker.png

10

return to couplet #8

11

return to couplet #10

  • Median lobe of clypeus with 3 teeth, the middle tooth elongate and much longer than thf' lateral ones. Occipital margin weakly concave. Scape shorter with SI 52-53. Eye relatively smaller with REL 30-31 (Figs. 48-52) (China: Yunnan Province) . . . . . Tetraponera protensa
Xu and Chai 2004 protensa sp nov head worker correct.png
Xu and Chai 2004 protensa sp nov body worker correct.png
  • Median lobe of clypeus with 3-5 teeth, sometimes the teeth may reduced, but the middle tooth not longer than the lateral ones. Occipital margin straight or weakly convex. Scape longer with SI 57-65. Eye relatively larger with REL 33-41 (China: Yunmm, Sichuan, Zhejiang, Fujian, Guangdong, Hainan and Taiwan Provinces, Guangxi Region, Hong Kong; widespread species distributed from India to Southern China, South to New Guinea and Northern Australia) . . . . . Tetraponera allaborans
Tetraponera allaborans casent0103239 head 1.jpg
Tetraponera allaborans casent0103239 profile 1.jpg

12

return to couplet #10

  • Pronotum lacking distinct lateral margins, in posterior view dorsum rounding gently into the sides. In profile view, petiolar node roundly and symmetrically convex (China: Yunnan Province) . . . . . Tetraponera amargina
Xu and Chai 2004 amargina sp nov head worker.png
Xu and Chai 2004 amargina sp nov body worker.png
  • Pronotum with distinct lateral margins, in posterior view lateral margins soft-edged. In profile view, petiolar node anterodorsally convex (China: Fujian, Guangdong and Hainan Provinces, Guangxi Region; North-east India to China, South to New Guinea) . . . . . Tetraponera modesta
Tetraponera modesta casent0281872 h 1 high.jpg
Tetraponera modesta casent0281872 p 1 high.jpg