Key to Asian Stigmatomma with 11 antennomeres

This worker key is based on: [[Media:Hsu, F.-C., Esteves, F.A., Chou, L.-S., Lin, C.-C. 2017. A new species of Stigmatomma from Taiwan.pdf|Hsu, F.-C., F.A. Esteves, L. -S. Chou and C.-C. Lin. 2017. A new species of Stigmatomma from Taiwan (Hymenoptera, Formicidae, Amblyoponinae). ZooKeys 705:81–94. (DOI 10.3897/zookeys.705.10296).]]

This worker and queen key can be used for all the Asian Stigmatomma species with 11 antennomeres. It is modified from the identification keys provided by Bharti and Rilta (2015), Eguchi et al. (2015), and Xu and Chu (2012). Stigmatomma with 12 antennomeres from this region can be determined using this 2012 key - Key to Asian Stigmatomma - beginning with couplet 5.

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Stigmatomma

1

 * Baso-masticatory margin of mandibles with two parallel rows of teeth, or with bifid teeth arranged in a single row . . . . . 2


 * Baso-masticatory margin of mandibles with undivided teeth arranged in a single row . . . . . 3

2
return to couplet #1
 * In full-face view, head trapezoidal: anterior margin wider than posterior margin. Baso-masticatory margin of mandible with five sets of paired teeth . . . . . Stigmatomma sakaii


 * In full-face view, head rectangular: anterior and posterior margins with same width. Baso-masticatory margin of mandible with four sets of paired teeth . . . . . Stigmatomma xui

3
return to couplet #1
 * Frontal carinae long, surpassing mid-length of the head. Antennal scrobe present . . . . . 4


 * Frontal carinae short, not surpassing mid-length of the head. Antennal scrobe absent . . . . . 5

4
return to couplet #3
 * Mandible bearing four teeth (including indistinct pre-apical tooth, and apical tooth). Anterior clypeal margin bearing five stout, dentiform setae. Frontal lobes relatively separated by median portion of clypeus . . . . . Stigmatomma scrobiceps


 * Mandible bearing six teeth (including pre-apical and apical teeth). Anterior clypeal margin bearing seven stout, dentiform setae. Frontal lobes closely approximated . . . . . Stigmatomma crypticum

5
return to couplet #3
 * Median mandibular teeth jigsaw-tab-shaped . . . . . 6


 * Median mandibular shaped otherwise, but never as jigsaw-tabs . . . . . 7

6
return to couplet #5
 * Clypeal setae rising from small tubercular projections of the anterior clypeal margin. Head rectangular, longer than wide (CI: 84; Xu 2000). Mandibles shorter than head (ML: 0.30, HL: 0.38; Xu 2000) . . . . . Stigmatomma mulanae


 * Clypeal anterior margin flat: clypeal setae rise from the anterior portion of the median area of the clypeus, not from the clypeal anterior margin. Head quadrate, as long as wide (CI: 100). Mandibles as long as head (MI: 100) . . . . . Stigmatomma luyiae

7
return to couplet #5
 * In full-face view, head trapezoidal: anterior margin much wider than posterior margin; slightly broader than long (CI: 101.9; Baroni Urbani 1978). Posterior margin of the head concave. Mandibular pre-apical tooth comparatively large. Anterior clypeal margin bearing eight stout, dentiform setae . . . . . Stigmatomma pertinax


 * In full-face view, head rectangular: anterior margin as wide as posterior margin; longer than broad (CI: 82-88; Onoyama 1999). Posterior margin of the head straight. Mandibular pre-apical tooth indistinct. Anterior clypeal margin bearing five stout, dentiform setae . . . . . Stigmatomma caliginosum