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|Combination in Eciton: Dalla Torre, 1893 PDF: 5; in Neivamyrmex (Labidus): Emery, 1895d PDF: 261; in Neivamyrmex (Acamatus): Emery, 1900e: 187; in Neivamyrmex (Neivamyrmex): Smith, 1942c PDF: 550; Gregg, 1963: 286; in Neivamyrmex: Borgmeier, 1955 PDF: 494; Watkins, 1972 PDF: 349.|
|Neivamyrmex nigrescens||Ward, P. S., 2005, A synoptic review of the ants of California (Hymenoptera: Formicidae)., Zootaxa 936, pp. 1-68: -1, (download)||-1||21008|
|Neivamyrmex nigrescens||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: 484-485, (download)||484-485||21290|
Found most commonly in these habitats: 13 times found in mixed forest at trail edge, nest in soil and rotting limb on ground, 0 times found in in residence, 1 times found in desert, 2 times found in oak-pine-juniper woodland, 1 times found in Live-oak shaded rock outcrop, 2 times found in chaparral, 2 times found in pine-oak forest, 3 times found in oak woodland, 1 times found in oak pine juniper woodland, 2 times found in chaparral on serpentine, ...
Found most commonly in these microhabitats: 8 times under stone, 4 times ground forager(s), 1 times ex rotting tree stump, 2 times under rock, 1 times raiding Formica moki at night, 2 times Messor nest midden, 2 times feeding on termites, 1 times dusk column, 1 times under rock, rocky hillside, 1 times under rock on hillside, 1 times on trail, ...
Collected most commonly using these methods: 5 times search, 2 times direct collection, 1 times army ant raid, 1 times Search, subterranean raid, 0 times pitfall trap.
Elevations: collected from 6 - 2438 meters, 1301 meters average