Key to Arabian Monomorium monomorium group species

This worker key is based on: [[Media:El Hawagry.pdf|El-Hawagry, M.S., Khalil, M.W., Sharaf, M.R., Hassan, H.F. & Aldawood, A.S. 2013. A preliminary study on the insect fauna of Al-Baha Province, Saudi Arabia, with descriptions of two new species. ZooKeys 274, 1–88. PDF]]

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Monomorium

1

 * Antennae with 11 segments . . . . . 2


 * Antennae with 12 segments . . . . . 5

2
return to couplet #1
 * Terminal funicular segment broadly swollen . . . . . Monomorium clavicorne


 * Terminal funicular segment enlarged, not Swollen . . . . . 3

3
return to couplet #2
 * Mesosoma without hairs . . . . . Monomorium aeyade


 * Mesosoma with hairs . . . . . 4

4
return to couplet #3
 * Mesonotum with at least six pairs of hairs, two on pronotum, four on mesonotum; antennal scapes shorter (SI 74-84); CI higher (74–80) . . . . . Monomorium exiguum


 * Mesosoma with fewer hairs, one pair on pronotum and two one mesonotum; antennal scapes slightly longer (SI 90); CI smaller (71) . . . . . Monomorium baushare

5
return to couplet #1
 * Mesosoma and waist densely and conspicuously reticulate-punctate . . . . . Monomorium sarawatense


 * Mesosoma and waist smooth and shining . . . . . 6

6
return to couplet #5
 * Head, in full-face view, with long hairs surrounding posterior margin and head sides forming a fringe; metanotal groove shallow . . . . . Monomorium qarahe


 * Head, in full-face view, without a fringe of long hairs; metanotal groove sharp and distinct . . . . . Monomorium exiguum