Key to Myrmecina of Sumatra

This worker key is based on: 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 . . . . . 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)