Nomamyrmex esenbeckii mordax

Identification
Watkins (1977) - Workers: transversely keeled posterior margin of mesonotum slightly to moderately concave in middle; prominent longitudinal rugae confined to anterior one-half to two-thirds of propodeum and do not usually extend to its posterior edge-there is a distinct granulated area in the posteromedial portion of the dorsum of the propodeum without longitudinal rugae. Males: setae on fifth gastric tergite distinctly but narrowly separated along the midline (i.e., the separation is about one-fourth the width of the tergite near its base); longitudinal rugae indistinct or absent on second gastric tergite except sometimes in sulcus at anterior edge; distal one-fourth of volsella gradually tapered and slightly bent downward; however, the volsella is occasionally more snout-shaped as in Nomamyrmex esenbeckii s. str''.

Distribution based on Regional Taxon Lists
Neotropical Region: Costa Rica, Honduras, Mexico.

Nomenclature

 *  mordax. Eciton (Holopone) crassicorne subsp. mordax Santschi, 1929a: 415, figs. d, h (w.) MEXICO. Watkins, 1977a: 210 (m.). Combination in Nomamyrmex: Borgmeier, 1953: 13. Junior synonym of wilsoni: Borgmeier, 1955: 139. Revived from synonymy as subspecies of esenbeckii: Watkins, 1977a: 205.