Key to Arabian Nesomyrmex

This worker key is based on: [[Media:Sharaf, M.R., Akbar, S.A. et al. 2017. Review of the ant genus Nesomyrmex from the Arabian Peninsula.pdf|Sharaf, M.R., Akbar, S.A., Aldawood, A.S., Hita Garcia, F. 2017. Review of the ant genus Nesomyrmex Wheeler, 1910 (Hymenoptera, Formicidae, Myrmicinae) from the Arabian Peninsula. African Invertebrates 58: 21–37 (DIO 10.3897/AfrInvertebr.58.12782).]]

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Nesomyrmex

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 * Anterior clypeal lobe short, flat-margined, and never convex, lobe with a small median triangular projection (Fig. 2A); dorsal pronotum anterolater¬ally sharply marginate, with sharp, dentate corners; in profile mesosomal out¬line strongly concave (Fig. 2B); petiole barrel-shaped with weakly developed, short and triangular petiolar node (Fig. 2B) . . . . . Nesomyrmex humerosus
 * Anterior clypeal lobe always conspicuously developed, convex and rounded, never with a small median triangular projection (Fig. 2C); dorsal pronotum anterolaterally weakly marginate without sharp, dentate corners; in profile mesosomal outline flat and uninterrupted (Fig. 2D); petiole with very well developed petiolar node (Fig. 2D) . . . . . 2

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return to couplet #1
 * Clypeus with median longitudinal carina (Fig. 3A); third mandibular tooth relatively larger and better developed (Fig. 3A) . . . . . Nesomyrmex angulatus
 * Clypeus without median longitudinal carina (Fig. 3A); third mandibular tooth relatively smaller and reduced (Fig. 3B) . . . . . Nesomyrmex zaheri