Key for the known queens of Lenomyrmex.
|1. Head foveolate, with median longitudinal striae; mesosoma predominantly smooth and shiny, with sparse punctures on pronotum, mesopleuron, metapleuron, and propodeum, scutellum and axillae foveolate, mesoscutum foveolate-striate, no erect hairs||inusitatus|
|–Head densely rugo-reticulate; mesosoma covered by sculpture, mesopleuron, scutellum, and propodeal dorsum with striae, axillae rugo-reticulate, mesoscutum rugulose, erect hairs||2|
|2(1). Propodeal spines approximately equal in length to distance between their bases; integument predominantly shiny; HL > 0.80||mandibularis|
|–Propodeal spines notably shorter than distance between their bases; integument predominantly opaque; HL < 0.80||wardi|