Key to Pseudolasius of India for major workers

This worker key is based on: [[Media:Akbar, S.A., Bharti, H., Wachkoo, A.A. 2017. Discovery of remarkable new ant species of the genus Pseudolasius from Western Ghats of India.pdf|Akbar, S.A., Bharti, H. & Wachkoo, A.A. 2017. Discovery of remarkable new ant species of the genus Pseudolasius Emery (Hymenoptera: Formicidae) From Western Ghats of India. Sociobiology 64(2), 133-137 (DOI: 10.13102/sociobiology.v64i2.1188).]]

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 * Pseudolasius

1

 * Eyes reduced, rudimentary represented by small dots without any distinct ommatidia . . . . . Pseudolasius zamrood


 * Eyes distinct consisting of prominent ommatidia . . . . . 2

2
return to couplet #1
 * Cephalic dorsum with an inverted “Y” shaped brown spot . . . . . Pseudolasius emeryi
 * Cephalic dorsum without an inverted “Y” shaped brown spot . . . . . 3

3
return to couplet #2
 * Antennal segments 3-9 longer than wide; frontal carinae parallel . . . . . 4
 * Antennal segments 3-9 wider than long; frontal carinae divergent posteriorly . . . . . Pseudolasius polymorphicus

4
return to couplet #3
 * Scapes easily surpass the posterior margin of head . . . . . 5
 * Scapes never surpass the posterior margin of head . . . . . Pseudolasius diversus 

5
return to couplet #4
 * Posterior margin of head strongly emarginate in the middle; mandibles with basal two teeth . . . . . 6
 * Posterior margin of head weekly emarginate in the middle; mandibles without basal two teeth combined . . . . . Pseudolasius binghami

6
return to couplet #5
 * Mandibles armed with 8 teeth . . . . . Pseudolasius familiaris
 * Mandibles armed with 6 teeth . . . . . Pseudolasius machhediensis