Key to Myrmecina of Sumatra

This worker key is based on: [[Media:Satria, R., Yamane, S. 2019. Two new species of the ant genus Myrmecina from Sumatra.pdf|Satria, R., Yamane, S. 2019. Two new species of the ant genus Myrmecina (Hymenoptera: Formicidae: Myrmicinae) from Sumatra. Zoosystematica Rossica 28, 183–193 (DOI 10.31610/zsr/2019.28.1.183).]]

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Myrmecina

1

 * Large size (HW ≥ 1.00 mm); mesosoma in lateral view with propodeal spines pointing anteriorly or dorsally (Figs 2A, 2B) . . . . . Myrmecina andalas


 * Small size (HW <1.00 mm); mesosoma in lateral view with propodeal spines pointing posteriorly . . . . . 2

2
return to couplet #1


 * Mesosoma in profile having propodeal spine small, shorter than basal width or equal to it . . . . . 3


 * Mesosoma in profile having propodeal spine distinct, with length exceeding basal width . . . . . 5

3
return to couplet #2


 * Dorsum of head only superficially sculptured, generally smooth and shiny; frontal lobe, area between eye and frontal lobe, and area close to mandibular base strongly sculptured . . . . . Myrmecina nitidiuscula


 * Head in frontal view entirely distinctly sculptured and mat . . . . . 4

4
return to couplet #3


 * In profile, pro-mesonotum weakly to moderately convex. In frontal view, anterior margin of clypeus straight. Eye large; its length approximately 1/4 of HL . . . . . Myrmecina bandarensis


 * In profile, pro-mesonotum strongly convex. In frontal view, anterior margin of clypeus slightly concave. Eye smaller; its length less than 1/4 of HL . . . . . Myrmecina butteli

5
return to couplet #2


 * In frontal view, clypeus with distinctly concave anterior margin . . . . . Myrmecina undulata


 * In frontal view, clypeus with straight anterior margin . . . . . Myrmecina nesaea (Described from gyne, workers not yet known or described)