Key to Echinopla serrata group workers

This worker key is based on: Zettel, H. & Laciny, A. 2017. Further additions to the taxonomy and distribution of the ant genus Echinopla. Annalen des Naturhistorischen Museums in Wien, B, 119: 7-16.

This key can be used to identify species of the E. serrata group (sensu Xu & Zhou 2015) occurring west of Weber's Line

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• Echinopla
• Echinopla species groups

1

• Large species (TL > 6 mm). Dorsal outline of mesosoma biconvex (consisting of two convexities separated by the deep metanotal groove). Dorsal pilosity long and black. Borneo. . . . . . Echinopla fisheri

• Small species (TL < 5 mm). Dorsal outline of mesosoma almost straight, subdivided by narrow metanotal groove. Dorsal pilosity short and pale. . . . . . 2

2

return to couplet #1

• Slender species; head longer than wide (CI 93–94); mesosoma almost twice as long as wide (MI 186–195). Philippines (Negros). . . . . . Echinopla angustata

• Stout species; head wider than long (CI 106–115); mesosoma up to one third longer than wide (MI 120–133). . . . . . 3

3

return to couplet #2

• Setae on scapes and legs very short, on scapes shorter than maximum scape width, on tibiae not reaching base of following setae. . . . . . 4

• Setae on scapes and legs of moderate length, on scapes longer than maximum scape width, on tibiae surpassing base of following setae. . . . . . 5

4

return to couplet #3

• Pores on gaster tergite 1 very dense, all distances smaller than their diameters. Meso- and metacoxa, and all trochanters pale testaceous. Philippines (Mindanao). . . . . . Echinopla brevisetosa

• Pores on gaster tergite 1 more widely spaced, some distances on disc larger than their diameters. All coxae and trochanters black. Borneo (Banggi Is.). . . . . . Echinopla rugosa

5

return to couplet #3

• Gaster tergite 1 hardly longer than wide (1.01 times), with widely spaced pores. West Malaysia, Borneo . . . . . Echinopla madli

• Gaster tergite 1 distinctly longer than wide (1.11–1.15 times), with relatively densely set pores. West Malaysia. . . . . . Echinopla wardi