Key to Asian Stigmatomma

Every Ant Tells a Story - And Scientists Explain Their Stories Here
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This worker key is based on: Xu, Z. & Chu, J. 2012. Four new species of the amblyoponine ant genus Amblyopone from southwestern China with a key to the known Asian species. Sociobiology. 59:1175-1196. PDF. Asian Stigmatomma with 11 antennomeres should be determined to species using the 2017: Key to Asian Stigmatomma with 11 antennomeres.

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1

2

return to couplet #1

Amblyopone fulvida side (www.niaes.affrc.go.jp).jpg

3

return to couplet #2

  • In full-face view, head about as broad as long. Mandibles deeply split at third tooth counting from apex. In profile view, subpetiolar process short and broad, roughly square (India) (Figs. 3-4) . . . . . Stigmatomma pertinax
  • In full-face view, head distinctly longer than broad. Mandibles not deeply split at third tooth counting from apex. In profile view, subpetiolar process long and narrow, slender . . . . . 4
Xu and Chu 2012. Figure 1-8.

4

return to couplet #3

  • In full-face view, anterior clypeal margin with 5 teeth. In profile view, posterodorsal corner of propodeum and anterodorsal corner of petiolar node rounded. Subpetiolar process oblique (Japan) (Figs. 5-6) . . . . . Stigmatomma caliginosum
  • In full-face view, anterior clypeal margin with 8 teeth. In profile view, posterodorsal corner of propodeum and anterodorsal corner of petiolar node bluntly angled. Subpetiolar process horizontal (China: Taiwan) (Figs. 7-8) . . . . . Stigmatomma sakaii
Amblyopone sakaii side (www.niaes.affrc.go.jp).jpg

5

return to couplet #1

  • In full-face view, head nearly square, about as broad as long . . . . . 6
  • In full-face view, head elongate trapezoidal, distinctly longer than broad . . . . . 12

6

return to couplet #5

  • In full-face view, anterior clypeal margin with 4-6 minute rectangular denticles . . . . . 7
  • In full-face view, anterior clypeal margin with 10-16 triangular or rectangular denticles . . . . . 9

7

return to couplet #6

  • In profile view, anterodorsal corner of petiolar node bluntly angled; subpetiolar process roughly rectangular, anteroventral corner acutely angled (China: Guangxi) (Figs. 9-10) . . . . . Stigmatomma eminia
  • In profile view, anterodorsal corner of petiolar node rounded, anterior face vertical to dorsal face; subpetiolar process triangular or square . . . . . 8
Xu and Chu 2012. Figure 9-12.

8

return to couplet #7

  • In full-face view, occipital margin narrowly deeply concave in the middle. In profile view, subpetiolar process triangular (China: Hunan) (Figs. 11-12) . . . . . Stigmatomma rubiginoum
  • In full-face view, occipital margin widely weakly concave. In profile view, subpetiolar process roughly square (China: Tibet and Yunnan) (Figs. 13-15) . . . . . Stigmatomma kangba
Xu and Chu 2012. Figure 13-21.

9

return to couplet #6

  • In full-face view, anterior clypeal margin with about 10 denticles, and a large protruding tooth on each side (India) (Figs. 16-17) . . . . . Stigmatomma bellii
Amblyopone bellii casent0102187 profile 1.jpg
  • In full-face view, anterior clypeal margin with 12-17 denticles, lateral sides without protruding large teeth . . . . . 10

10

return to couplet #9

  • In full-face view, anterior clypeal margin with about 17 denticles. Eyes larger, with its diameter about as broad as the width of antennal scape (Indonesia) (Figs. 18-19) . . . . . Stigmatomma reclinatum
Amblyopone reclinata casent0172222 profile 1.jpg
  • In full-face view, anterior clypeal margin with about 12 denticles. Eyes smaller, with its diameter narrower than the width of antennal scape . . . . . 11

11

return to couplet #10

  • In full-face view, anterior clypeal margin with about 12 rectangular denticles. Occipital corners rounded (China: Taiwan) (Figs. 20-21) . . . . . Stigmatomma bruni
Amblyopone bruni casent0102511 profile 1.jpg
  • In full-face view, anterior clypeal margin with about 12 triangular denticles. Occipital corners blunt (Vietnam) . . . . . Stigmatomma quadratum

12

return to couplet #5

  • Anterior clypeal margin with more than 10 denticles, the denticles not divided into lobes . . . . . 13
  • Anterior clypeal margin with less than 10 teeth or lobes, some teeth maybe divided into lobes. . . . . . 15

13

return to couplet #12

  • Anterior clypeal margin with 10 denticles, and a large triangular tooth on each side (Myanmar) (Figs. 22-23) . . . . . Stigmatomma feae
Amblyopone feae casent0102126 profile 1.jpg
  • Anterior clypeal margin with 12-15 denticles, lateral sides without large triangular teeth . . . . . 14
Xu and Chu 2012. Figure 22-30.

14

return to couplet #13

  • In full-face view, occipital margin weakly concave. Anterior clypeal margin with about 12 denticles. In profile view, anterodorsal corner of petiolar node bluntly angled. Posteroventral corner of subpetiolar process acutely toothed (China: Yunnan) (Figs. 24-25) . . . . . Stigmatomma crenatum
Amblyopone crenata casent0104983 profile 1.jpg
  • In full-face view, occipital margin nearly straight. Anterior clypeal margin with about 15 denticles. In profile view, anterodorsal corner of petiolar node rounded. Posteroventral corner of subpetiolar process rightly angled (India) (Figs. 26-27) . . . . . Stigmatomma rothneyi
Amblyopone rothneyi casent0102186 profile 1.jpg

15

return to couplet #12

  • Anterior clypeal margin with a broad large middle lobe, each side with 1 or 2 simple teeth and a narrow small lateral lobe . . . . . 16
  • Anterior clypeal margin without a broad large middle lobe, teeth simple or pairly combined at base . . . . . 19

16

return to couplet #15

  • Anterior clypeal margin with 2 simple teeth between the middle and lateral lobes. The middle lobe truncated at apex, and with a small denticle on each side (China: Tibet) (Figs. 28-30) . . . . . Stigmatomma zoma
  • Anterior clypeal margin with 1 simple tooth between the middle and lateral lobes. The middle lobe with 4 denticles . . . . . 17

17

return to couplet #16

  • In full-face view, occipital margin narrowly weakly concave in the middle. Occipital corners rounded. Eyes absent (China: Yunnan) (Figs. 31-32) . . . . . Stigmatomma trilobum
Amblyopone triloba casent0104981 profile 1.jpg
  • In full-face view, occipital margin widely weakly concave. Occipital corners prominent. Eyes present . . . . . 18
Xu and Chu 2012. Figure 31-38.

18

return to couplet #17

  • In full-face view, lateral sides of head nearly straight, anterolateral corner with a short tooth. Lateral lobes of anterior clypeal margin bifid at apex. Eyes each with 5 facets. In profile view, subpetiolar process roughly triangular (China: Yunnan) (Figs. 33-35) . . . . . Stigmatomma meilianum
  • In full-face view, lateral sides of head weakly convex, anterolateral corner with a long tooth. Lateral lobes of anterior clypeal margin simple. Eyes each with about 18 facets. In profile view, subpetiolar process roughly rectangular (New Guinea) (Figs. 36-37) . . . . . Stigmatomma noonadan
Amblyopone noonadan casent0172804 profile 1.jpg

19

return to couplet #15

20

return to couplet #19

  • Anterior clypeal margin straight, with 6 isolated teeth, the lateral ones larger than the others (Vietnam) (Fig. 38) . . . . . Stigmatomma amblyops
  • Anterior clypeal margin roundly convex, the median 2 teeth combined at base, the lateral ones not larger than the others . . . . . 21

21

return to couplet #20

  • The lateral 2 teeth of the anterior clypeal margin combined at base. Mandibles relatively narrow (New Guinea) (Figs. 39-40) . . . . . Fulakora papuana
Amblyopone papuana casent0102189 profile 1.jpg
  • The lateral 2 teeth of the anterior clypeal margin isolated. Mandibles relatively broad (Indonesia) (Figs. 41-42) . . . . . Stigmatomma minutum
Amblyopone minuta casent0102516 profile 1.jpg
Xu and Chu 2012. Figure 39-46.

22

return to couplet #19

  • Anterior clypeal margin with 7 teeth. Anterolateral curve of clypeus with a tooth . . . . . 23
  • Anterior clypeal margin with 8 teeth. Anterolateral curve of clypeus without a tooth. . . . . . 24

23

return to couplet #22

  • In full-face view, head weakly longer than broad. Eyes present. Anterior clypeal teeth isolated, not pairly combined. In profile view, anterodorsal corner of petiolar node rounded, subpetiolar process roughly rectangular (Israel) (Figs. 43-44) . . . . . Stigmatomma ophthalmicum
Amblyopone ophthalmica casent0101746 profile 1.jpg
  • In full-face view, head strongly longer than broad. Eyes absent. Anterior clypeal teeth pairly combined at base. In profile view, anterodorsal corner of petiolar node bluntly angled, subpetiolar process triangular (India) (Figs. 45-46) . . . . . Stigmatomma boltoni
Stigmatomma boltoni casent0179570 p 1 high.jpg

24

return to couplet #22

  • Anterior clypeal teeth isolated, not pairly combined at base . . . . . 27

25

return to couplet #24

  • Dorsolateral sides of alitrunk and petiole strongly marginated (Philippines) (Figs. 47-48) . . . . . Stigmatomma luzonicum
Amblyopone luzonica casent0172812 profile 1.jpg
  • Dorsolateral sides of alitrunk and petiole rounded, not marginated . . . . . 26
Xu and Chu 2012. Figure 47-56.

26

return to couplet #25

  • In profile view, anterodorsal corner of petiolar node acutely angled, anterior face weakly concave, dorsal face straight (China: Zhejiang and Taiwan; Korea Peninsula, Japan) (Figs. 49-50) . . . . . Stigmatomma silvestrii
Amblyopone silvestrii casent0102204 profile 1.jpg
  • In profile view, anterodorsal corner of petiolar node rightly angled, anterior face straight, dorsal face weakly convex (China: Yunnan and Tibet) (Figs. 51-56) . . . . . Stigmatomma awa

27

return to couplet #24

  • Anterior clypeal margin roundly convex, the clypeal teeth decreased in length from middle to lateral sides (Turkmenia) (Fig. 57) . . . . . Stigmatomma annae
  • Anterior clypeal margin straight, the clypeal teeth with the similar length . . . . . 28

28

return to couplet #27

  • In full-face view, occipital corners rounded, lateral sides of head nearly straight. In profile view, posterodorsal corner of propodeum rounded. Anterior face of petiolar node straight (China: Yunnan) (Figs. 58-59) . . . . . Stigmatomma octodentatum
Stigmatomma octodentatum casent0235342 p 1 high.jpg
  • In full-face view, occipital corners prominent, lateral sides of head evenly convex. In profile view, posterodorsal corner of propodeum bluntly angled. Anterior face of petiolar node weakly concave (China: Taiwan) (Figs. 60-61) . . . . . Stigmatomma zaojun
Amblyopone zaojun side (www.niaes.affrc.go.jp).jpg