Trachymyrmex species groups

These groups are based on numerous revisions that each focused on a single species group.

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Trachymyrmex

Jamaicensis
based on Mayhé-Nunes & Brandão (2007)

species

 * Trachymyrmex atlanticus
 * Trachymyrmex haytianus
 * Trachymyrmex isthmicus
 * Trachymyrmex ixyodus
 * Trachymyrmex jamaicensis
 * Trachymyrmex zeteki

Identification
Key to jamaicensis species group workers

Diagnosis
Diagnosis: Monomorphic attine ants with the antennal scrobe margins always reaching and even surpassing the posterior margin of the head; frontal and preocular carinae well marked, subparallel throughout their whole extension, limiting the impressed antennal scrobe; extremities of frontal and preocular carinae always separate and with up to three triangular or rounded compressed tubercles or vertical teeth close to the posterior margin; preocular carina not curved mesad above eyes. Frontal lobes from moderately approximate to moderately expanded laterad, but in most species the interfrontal width near 2/3 of the head width across the eyes (FLI 50–70). Occipital projections (teeth or spines) always present on head. Posterior margin in full-face view smoothly concave, notched in the middle. The paired vertexal carinae indicated by a series of weakly connected piligerous denticles, flanking the shallowly impressed sagital furrow, which in front joins the transverse impression of frons, behind the frontal area. Outer border of mandibles sinuous. Mandibles with discal area smooth and shining, the fine striae confined to the mandibular bases and sides. All funicular segments, including 2nd, longer than broad.