|Combination in Neivamyrmex (Neivamyrmex): Smith, 1942c PDF: 555; in Neivamyrmex: Borgmeier, 1953 PDF: 5.|
|Raised to species: Emery, 1900e: 186.|
Natural History: Also relatively common and well-known, the habits of N. opacithorax are quite similar to those of N. nigrescens. Males are bicolored, black with a reddish-brown gaster, and may be seen flying on calm, cool, sunny, late summer or early fall days.
Found most commonly in these habitats: 1 times found in road edge in mesophyl forest, 2 times found in 2º wet forest, 1 times found in grazed creosote desert, 1 times found in oak pine juniper woodland, 2 times found in swamp forest, 1 times found in pine-oak forest, 1 times found in in mature sand pine forest, 1 times found in Larrea desert, 1 times found in oak-pine-juniper forest, 1 times found in Ponderosa Pine for. 50' tall. Dry creekbed w / shrubby lonicera + Robinia unders, ...
Collected most commonly using these methods or in the following microhabitats: 4 times search, 2 times Baiting, 1 times Search, subterranean raid, 1 times general collecting, 1 times Malaise trap
Elevations: collected from 6 - 1960 meters, 1239 meters average