Search Path - How you got here.  Click on the path to backtrack.
  Number of segments between alitrunk and gaster  (2 segments (petiole and postpetiole) are reduced or isolated between the alitrunk and the gaster)     Eye size  (Eye composed of more than one lens)     Spines on alitrunk  (Alitrunk with spines)     Psammophore  (Ventral side of head and mandibles without basket-like series of hairs)     Postpetiole attachment  (Postpetiole attached to front surface of first gastral segment; petiole with a node and not dorsoventrally flattened)     Tubercles  (Dorsal surface of entire body covered with tubercles)

Identity - What this specimen is (based on the available information).
Family - Formicidae,  Subfamily - Myrmicinae,  Genus - Trachymyrmex


Diagnostic - How to further narrow the specimen's identity.  Select the most appropriate option.
Feature to examine:  Lateral spine

  Option 1

Lateral spine on pronotum (at 45 degrees) pointed; epinotum spine curved slightly backward

  Option 2

Lateral spine on pronotum (at 45 degrees) branched; epinotum spine curved backward more

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Trachymyrmex septentrionalis body
(Tim Linksvayer)