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|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.
|Neivamyrmex opacithorax||Ward, P. S., 2005, A synoptic review of the ants of California (Hymenoptera: Formicidae)., Zootaxa 936, pp. 1-68: -1, (download)||-1||21008|
|Neivamyrmex opacithorax||Snelling, G. C. & Snelling, R. R., 2007, New synonymy, new species, new keys to Neivamyrmex army ants of the United States., Advances in ant systematics (Hymenoptera: Formicidae): Homage to E. O. Wilson - 50 years of contributions. (Memoirs of the American Entomological Institute 80), pp. 459-550: 486-487, (download)||486-487||21290|
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 oak pine juniper woodland, 1 times found in grazed creosote desert, 1 times found in pine-oak forest, 2 times found in swamp forest, 1 times found in leaf litter, 1 times found in oak-pine-juniper forest, 1 times found in old sawdust amid slabs, 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, 2 times Berlese, 1 times Search, subterranean raid, 0 times under rock, 1 times general collecting, 1 times Malaise trap
Elevations: collected from 6 - 1960 meters, 1206 meters average
Type specimens: syntype of Eciton californicum opacithorax: casent0903735