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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- 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
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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
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- Costae on vertex at most weakly distorted (Fig. 41); eye and ocelli relatively small (EI + OI ≦ 25) (Taiwan) . . . . . Chrysapace sauteri
- Costae on vertex strongly and coarsely distorted (Figs. 42, 43); eye and ocelli relatively large (EI + OI ≧ 29) (northern India, Yunnan, Guangxi) . . . . . . Chrysapace costatus