Key to Nomamyrmex workers

This worker key is based on: [[Media:Watkins 1977a.pdf|Watkins, J. F., II. 1977a. The species and subspecies of Nomamyrmex (Dorylinae: Formicidae). Journal of the Kansas Entomological Society. 50:203-214. PDF]]

Caution: A few workers of N. esenbecki s. str. and N. esenbecki crassicornis may have slightly concave mesonotal keels -usually not all workers in a series. These variants make couplet 2 of this key difficult; however, these workers can be distinguished on the basis of the geographical range given in couplet 2. The shape of the postpetiole of esenbecki s. str. ( c.f., couplet 4.a.), and the coloration of crassicornis ( c.f., couplet 4.b.) will also help distinguish these variants.

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Nomamyrmex

1

 * Postoccipital sulcus absent (Fig. 1); dorsum of petiole without longitudinal rugae . . . . . Nomamyrmex hartigii


 * Postoccipi tal sulcus present (Fig. 2-5); dorsum of petiole with longitudinal rugae . . . . . Nomamyrmex esenbeckii