Key to Chrysapace

This worker key is based on: Yamada, A., Lin, C.-C., Eguchi, K. 2019. Taxonomic notes on the rare ant genus Chrysapace with description of a new species from Brunei (Hymenoptera: Formicidae: Dorylinae). Acta Entomologica Musei Nationalis Pragae 59: 467-480 (doi:10.2478/aemnp-2019-0036).

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Chrysapace

1

• Abdominal tergite IV–VI longitudinally costate (except for anterior marginal areas); dorsum of mesosoma transversely arched in most areas (Sumatra, Borneo, Philippines). . . . . Chrysapace jacobsoni

• Abdominal tergite IV–VI lacks any costation; dorsum of mesosoma longitudinally costate . . . . . 2

2

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• Abdominal tergite III with costae which are transversely arched around center of posterior margin in dorsal view (Brunei) . . . . . Chrysapace merimbunensis

• Abdominal tergite III longitudinally costate . . . . . 3

3

return to couplet #2

• Costae on vertex at most weakly distorted (Fig. 41); eye and ocelli relatively small (EI + OI ≦ 25) (Taiwan) . . . . . Chrysapace sauteri

Yamada, Lin, and Eguchi 2020. Figures 41-43. Difference of worker’s head sculpture betweenChrysapace sauteri andChrysapace costatus. 41 - C. sauteri from Taiwan, colony: Eg12v17-1214; 42 - C. costatus from Yunnan; 43 - C. costatus holotype from India.

• Costae on vertex strongly and coarsely distorted (Figs. 42, 43); eye and ocelli relatively large (EI + OI ≧ 29) (northern India, Yunnan, Guangxi) . . . . . . Chrysapace costatus