Key to Platythyrea of southeast Asia

This worker key is based on: [[Media:Phengsi, N., Jaitrong, W. et al. 2018. A sibling species of Platythyrea clypeata in southeast Asia.pdf|Phengsi, N., Jaitrong, W., Ruangsittichai, J., Khachonpisitsak, S. 2018, A sibling species of Platythyrea clypeata Forel, 1911 in southeast Asia (Hymenoptera, Formicidae, Ponerinae). ZooKeys 729: 87–102 (DOI 10.3897/zookeys.729.21378).]]

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Platythyrea

1

 * Frontal carinae very widely spaced, not continuing beyond level of posterior margin of antennal insertions (Fig. 7A); propodeal spiracle opening circular . . . . . 2


 * Frontal carinae relatively narrowly separated, extending far beyond level of posterior margin of antennal insertions where space between them is very narrow (Fig. 7B); propodeal spiracle opening elliptical . . . . . 6

2
return to couplet #1


 * In dorsal view, posterior margin of petiole with 2-3 distinct spines, teeth or blunt angles (Fig. 8A, B) . . . . . 3


 * In dorsal view, posterior margin of petiole without distinct spines, teeth or sharp angles (Fig. 8C) . . . . . 5

3
return to couplet #2


 * In dorsal view, posterior margin of petiole clearly concave with distinct lateral blunt angles; petiole almost as long as high . . . . . 4


 * In dorsal view, posterior margin of petiole with 3 distinct spines; petiole longer than high (Fig. 8B) . . . . . Platythyrea tricuspidata

4
return to couplet #3


 * In profile view, propodeum armed with a pair of short teeth or tubercles (Fig. 9); lateral face of pronotum punctate with dense foveae . . . . . Platythyrea quadridenta


 * In profile view, propodeum unarmed; dorsum curving evenly into declivity (see fig. 28 in Brown 1975); lateral face of pronotum punctate with sparse foveae . . . . . Platythyrea bidentata

5
return to couplet #2


 * In dorsal view, petiole clearly longer than broad; antennal scape relatively short, not reaching posterolateral corner of head . . . . . Platythyrea parallela


 * In dorsal view, petiole almost as long as broad; antennal scape relatively long, slightly extending beyond posterolateral corner of head . . . . . Platythyrea inermis

6
return to couplet #1


 * Head relatively shorter (CI 72–74); eye clearly larger (EL 0.20 mm with 11 ommatidia on longest axis); eye convex; dorsum and lateral face of head finely micropunctate without foveae; in profile view petiole clearly longer than high and in dorsal view node of petiole anteriorly as broad as posteriorly; ventral outline of petiole weakly convex . . . . . Platythyrea janyai sp. n.


 * Head relatively longer (CI 61–69); eye clearly smaller (EL 0.10 mm with 5 ommatidia on longest axis); eye flat; dorsum and lateral face of head finely punctate with dense shallow foveae; in profile view petiole slightly longer than high and in dorsal view node of petiole slightly narrower posteriorly; ventral outline of petiole feebly concave . . . . . Platythyrea clypeata

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