Key to Arabian Monomorium monomorium group species
This key to workers is based on a key from: Sharaf M., H. M. Al Dhafer, A. S. Aldawood, and F. Hita Garcia. 2018. Ants of the Monomorium monomorium species-group (Hymenoptera: Formicidae) in the Arabian Peninsula with description of a new species from southwestern Saudi Arabia. PeerJ 6:e4277. doi:10.7717/peerj.4277
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1
- Antenna 12-segmented . . . . . 2
- Antenna 11-segmented . . . . . 3
2
- Body pilosity clubbed; mesosoma, petiole and postpetiole distinctly sculptured (Fig. 4A) . . . . . Monomorium sarawatense
- Body pilosity simple; mesosoma, petiole and postpetiole smooth and shining (Fig. 4B) . . . . . Monomorium holothir
3
- Mesosoma without standing hairs (Figs. 4C and 4D) . . . . . 4
- Mesosoma with standing hairs (Figs. 4E and 4F) . . . . . 5
4
- Eyes appearing larger, with a ring of seven to eight ommatidia encircling a single row of 2 ommatidia, and in profile closer to mandibular insertions (EM 0.05); mesoand metapleuron smooth; petiole and postpetiole smooth and each with one pair of standing hairs (Fig. 4C) . . . . . Monomorium aeyade
- Eyes appearing smaller, with only 5–6 ommatidia, and in profile further away from mandibular insertions (EM 0.09–0.11); meso-and metapleuron finely shagreened; petiole and postpetiole superficially shagreened and without standing hairs (Fig. 4D) . . . . . Monomorium mohammedi
5
- Mesosoma with only two pairs of standing hairs, one on pronotal corners and one on propodeum (Fig. 4E) . . . . . Monomorium clavicorne
- Mesosoma with several pairs of standing hairs, about 10 pairs (Fig. 4F) . . . . . Monomorium exiguum