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Species: Neivamyrmex halidaii   (Shuckard, 1840) 

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Taxonomic History (provided by Barry Bolton, 2022)

Labidus halidaii Shuckard, 1840a PDF: 200 (m.) BRAZIL (São Paulo). Neotropic. Primary type information: Type-material: syntype males (number not stated). Type-locality: Brazil: St Paul (= São Paulo). Type-depository: unknown (not in BMNH, OXUM, LSLC, or MVMA; presumed lost). Type notes: Shuckard recorded the syntypes as “in the collection of Capt. King R.N. and Mr Curtis”. AntCat AntWiki HOL

Taxonomic history

[Misspelled as halidayi by Roger, 1863b PDF: 42; Dalla Torre, 1893 PDF: 3, and many others.]
Combination in Eciton: Forel, 1895b PDF: 119.
Combination in Eciton (Acamatus): Emery, 1900e: 187.
Combination in Neivamyrmex: Borgmeier, 1953 PDF: 13.
Senior synonym of Neivamyrmex enzmanni new synonym (unpublished).
[Note: Neivamyrmex enzmanni is a replacement name for Neivamyrmex mexicana (Enzmann, 1952), but proposed subsequent to Snelling & Snelling, 2007 PDF; hence an automatic junior synonym].
Senior synonym of Neivamyrmex mexicana (Enzmann, 1952): Snelling & Snelling, 2007 PDF: 472.
// Distribution


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

Distribution Notes:

Mexico to northern Argentina and Bolivia. Costa Rica: Atlantic slope to 300m, Monteverde at 1400m.


In Costa Rica, I know workers of this species from several widespread and diverse situations. Dana Meyer collected workers from a rotten log at Sirena in Corcovado National Park. I collected workers from a column on the main road in the Monteverde Cloud Forest Reserve, at 1500m elevation. I observed the column at 1240hrs. The column was tight, with rows of stationary workers on the sides, mandibles open and pointed upward. The column was partially on open ground, partially under a soil-covered gallery before disappearing underground. There were several phorid flies running with the column.

In Costa Rica, at La Selva and the 300m site on the Barva transect, most males have been collected at lights. Males have been collected in 15 different light trap samples. In an 18-month light trapping program, all males occurred from February to May, which is the dry season. One male was captured in a Malaise trap; given the intensity of Malaise trap sampling at La Selva, this is a very rare event. In Monteverde a male was found inside a house at night, apparently attracted to the light.


Worker: Posterior face of propodeum straight, not concave, as long or longer than dorsal face; eye without distinct convex cornea; apex of scape does not exceed eye level; anteroventral tooth of petiole broadly triangular, shallow to nearly absent; face with abundant strong puncta; mesosomal dorsum with roughened sculpture; pilosity of mesosomal dorsum relatively dense, short, and of uniform length (contrasting with swainsonii, which has longer, sparser pilosity of variable length).

Taxonomic Notes:

J. Longino, 17 Dec 2021: In Central America, workers that key to antillanus (Forel 1897) and males that key to halidaii (Shuckard 1840) are in the same DNA barcode cluster.


Bolton, B. 1995. A new general catalogue of the ants of the world. Harvard University Press, Cambridge, Mass.

Borgmeier, T. 1955. Die Wanderameisen der neotropischen Region. Studia Entomologica 3:1-720.

Watkins, J. F., II. 1976. The identification and distribution of New World army ants (Dorylinae: Formicidae). Baylor University Press, Waco, Texas.

Taxonomic Treatment (provided by Plazi)

Scientific Name Status Publication Pages ModsID GoogleMaps
Neivamyrmex halidaii   Wild, A. L., 2007, A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)., Zootaxa 1622, pp. 1-55: 26, (download) 26 21367
Neivamyrmex halidaii   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: 472-473, (download) 472-473 21290

Specimen Habitat Summary

Found most commonly in these habitats: 7 times found in montane wet forest, 9 times found in mature rainforest, 5 times found in cloud forest, 5 times found in STR 1800m., 4 times found in wet forest, 5 times found in rainforest, 1 times found in 2˚ tropical forest, 3 times found in CES 350m., 2 times found in cloud forest clearing, 1 times found in 2º tropical rainforest, ...

Found most commonly in these microhabitats: 9 times light trap, 7 times ex sifted leaf litter, 4 times at light, 1 times subterranean, 4 times flight intercept trap, 1 times blacklight, 1 times at bait, 1 times Abajo, 2 times Malaise trap, 1 times forest litter, 1 times column on ground, ...

Collected most commonly using these methods: 17 times Lighttrap, 10 times Blacklight, 12 times light trap, 6 times MiniWinkler, 4 times search, 1 times subterranean trap, 4 times flight intercept trap, 4 times Malaise, 1 times Baiting, 1 times Berlese, 1 times FIT, ...

Elevations: collected from 10 - 1850 meters, 513 meters average

Collect Date Range: collected between 1929-01-01 and 2019-10-28

Type specimens: Holotype of Neivamyrmex halidaii: casent0902650; syntype of Eciton colombi: casent0915349; syntype of Eciton lemoulti: casent0911398; syntype of Labidus gravenhorstii: casent0901961

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