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Species: Neivamyrmex swainsonii   (Shuckard, 1840) 

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Current Valid Name:

Taxonomic History (provided by Barry Bolton, 2023)

Labidus swainsonii Shuckard, 1840a PDF: 201 (m.) BRAZIL. Neotropic. Primary type information: Type-material: holotype male. Type-locality: Brazil: (no further data) (Swainson). Type-depository: BMNH. Type notes: Borgmeier, 1955 PDF: 454, nominates Bahia, São Salvador as type-locality. AntCat AntWiki HOL

Taxonomic history

Combination in Eciton: Forel, 1895b PDF: 121.
Combination in Eciton (Acamatus): Emery, 1900e: 187.
Combination in Neivamyrmex: Borgmeier, 1953 PDF: 15.
Status as species: Westwood, 1842 PDF: 76; Smith, 1859c PDF: 8; Roger, 1863b PDF: 42; Mayr, 1863a PDF: 425; Dalla Torre, 1893 PDF: 6; Forel, 1895b PDF: 121; Forel, 1899b PDF: 29; Emery, 1900e: 178 (in key); Emery, 1910b PDF: 27; Santschi, 1916e PDF: 370; Gallardo, 1920 PDF: 379; Borgmeier, 1923: 50; Wheeler, 1925a PDF: 2; Santschi, 1931f PDF: 274; Borgmeier, 1936b PDF: 61; Borgmeier, 1948b PDF: 462; Borgmeier, 1953 PDF: 16; Borgmeier, 1955 PDF: 454 (redescription); Smith, 1958c PDF: 109; Kempf, 1972b PDF: 160; Watkins, 1972 PDF: 352 (in key); Hunt & Snelling, 1975 PDF: 21; Watkins, 1976 PDF: 24 (in key); Smith, 1979: 1332; Snelling & George, 1979: 34; Watkins, 1982 PDF: 214 (in key); Watkins, 1985 PDF: 484 (in key); Bolton, 1995b: 291; Palacio, 1999: 160 (in key); Mackay & Mackay, 2002 PDF: 65; Ward, 2005 PDF: 62; Wild, 2007b PDF: 26; Snelling & Snelling, 2007 PDF: 490; Branstetter & Sáenz, 2012 PDF: 254; Palacio, 2019 PDF: 621.
// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Argentina, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guatemala, Mexico, Nicaragua, Paraguay, Trinidad and Tobago, United States, Venezuela
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Nearctic, Neotropical

Distribution Notes:

Southern USA to Argentina. Costa Rica: Northern Pacific lowlands, Atlantic lowlands, southern highlands.


Natural History:

I collected workers of this species under a rock on the ridge between Playa Naranjo and Playa Nancite in Santa Rosa National Park, an area of scrubby vegetation and grasses in a relatively xeric habitat. Ivette Perfecto collected workers in a coffee farm near Heredia. Curiously, males are known from La Selva Biological Station in the Atlantic lowlands and Wilson Botanical Garden in the southern mountains. During an 18-month program of sampling using blacklight traps at La Selva, as part of the ALAS project, males occurred in three different samples, in the months of March and May.


True N. swainsonii (TL Brazil) may not be conspecific with the Nearctic populations so identified.


The workers of this species have traditionally been identified as fallax Borgmeier 1953.

Taxonomic Treatment (provided by Plazi)

Scientific Name Status Publication Pages ModsID GoogleMaps
Neivamyrmex swainsonii   Ward, P. S., 2005, A synoptic review of the ants of California (Hymenoptera: Formicidae)., Zootaxa 936, pp. 1-68: -1, (download) -1 21008
Neivamyrmex swainsonii   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: 489-490, (download) 489-490 21290
Neivamyrmex swainsonii   Wild, A. L., 2007, A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)., Zootaxa 1622, pp. 1-55: 26, (download) 26 21367

Specimen Habitat Summary

Found most commonly in these habitats: 1 times found in 2° wet forest, 1 times found in coffee farms vic. Heredia, 5 times found in mature rainforest, 5 times found in SOR 750m., 4 times found in agricultural zone, 2 times found in oak-juniper woodland, 2 times found in desert, 2 times found in oak-pine-juniper woodland, 0 times found in collected in vacant area adjacent to parking lot, 1 times found in Podocarpus forest, ...

Found most commonly in these microhabitats: 2 times ex sifted leaf litter, 5 times under stone, 5 times light trap, 1 times under rock in leaf litter under oak, 1 times in raided Solenopsis xyloni nest., 1 times ex sifting forest litter, 1 times column on ground, 1 times at lights., 1 times raid attacking Pheidole, 1 times dusk column, 1 times at lights, ...

Collected most commonly using these methods: 13 times Lighttrap, 9 times light trap, 1 times MaxiWinkler, 3 times search, 4 times pitfall, 1 times hand collecting, 1 times Booty dump, 1 times miniWinkler, 1 times at light, in classroom, 1 times Search, subterranean raid, 1 times blacklight, ...

Elevations: collected from 6 - 3150 meters, 854 meters average

Collect Date Range: collected between 1895-06-25 00:00:00.0 and 2019-10-28 00:00:00.0

Type specimens: Holotype of Neivamyrmex mexicanus: casent0902645; Holotype of Neivamyrmex swainsonii: casent0902641; syntype of Eciton aztecum: casent0905972

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