Labidus praedator

Barth et al. (2015) - One of the most abundant and ubiquitous Neotropical swarm-raiders is Labidus praedator with extremely large colonies (probably over 1,000,000 individuals) and a wide distribution range spanning from Mexico to northern Argentina (Rettenmeyer 1963; Schneirla 1971; Watkins 1976; Longino 2005). Raids of L. praedator are frequent in the Neotropics (Kaspari and O’Donnell 2003; O’Donnell et al. 2007) and can deplete invertebrate biomass in the litter by up to 75 % (Kaspari et al. 2011).

Identification
Jack Longino:

Worker: color brown; face microsculptured, matte; mesosoma relatively gracile, dorsal face of propodeum as long as or longer than posterior face; ventral margin of petiole flat, lacking anteroventral tooth.

Similar species: ''Labidus spininodis'.

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina, Belize, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guatemala, Guyana, Honduras, Mexico, Panama, Paraguay, Peru, Venezuela.

Biology
Barth et al. (2015) found genetic differences among four colonies of L praedator that were all collected within a range of 10 km around the city of Tapachula (Chiapas) Mexico. They suggested their findings indicate there are two sympatric species present that are not distinguishable from morphological differences. This supports and adds further evidence to a hypothesis there are numerous species subsumed under this single species name.

Baudier et al. (2015) studied thermal tolerances of a variety of army ant workers. Labidus praedator was one of a number of army ant species sampled with a life history that includes both below and above ground activities.

Jack Longino: This is a widespread and common species throughout the Neotropics. In Costa Rica it can be locally abundant, but seems to be somewhat patchy. I have not encountered it in dry forest areas, but it does occur in both lowland and montane wet forest. On the Barva transect in Braulio Carrillo National Park, it is a relatively rare ant at La Selva but reaches much higher density at 1000-1500m elevation.

Labidus praedator forms massive carpet raids that blanket the ground. In some ways they can be more impressive than Eciton burchellii, because the workers are smaller and more dense, and the ground and low vegetation become almost entirely black with a seething mass of workers. They seem to be mainly subterranean, without surface bivouacs. The large surface raids always seem to emerge spontaneously from the leaf litter or from a hole in the ground. Small segments of columns may be encountered, emerging from one hole and entering another one a few meters away.

I have rarely observed the prey of L. praedator, so I do not know what their dietary preferences are. In one raid I observed a mass of workers harvesting pieces from a fruit on the forest floor, so they may have somewhat generalized scavenging habits, like Labidus coecus. In cloud forest habitats I have sometimes seen masses of terrestrial isopods rushing up low vegetation and forming clusters on leaf tips in response to a Labidus swarm in the leaf litter below, but I do not know if the Labidus actually prey on the isopods.

Males are occasionally attracted to lights at night, and may also be collected in Malaise traps.

Nomenclature

 *  praedator. Eciton praedator Smith, F. 1858b: 152 (s.w.) BRAZIL. Forel, 1906d: 246 (m.); Luederwaldt, 1918: 54 (q.). Combination in E. (Labidus): Bruch, 1914: 215; in Labidus: Borgmeier, 1953: 16. Senior synonym of tepeguas: Mayr, 1886b: 118; Borgmeier, 1955: 103; of westwoodi: Emery, 1910b: 23; Borgmeier, 1955: 103; of emiliae, guianense: Borgmeier, 1953: 10, 19, respectively; of ferruginea: Borgmeier, 1955: 103. Current subspecies: nominal plus sedulus. See also: Gallardo, 1920: 333; Bruch, 1921: 181; Watkins, 1976: 8.
 * ferruginea. Eciton tepeguas var. ferruginea Norton, 1868b: 46 (s.) MEXICO. Subspecies of praedator: Dalla Torre, 1893: 5; Forel, 1899c: 26. Junior synonym of praedator: Borgmeier, 1955: 86.
 * tepeguas. Eciton tepeguas Norton, 1868b: 46 (s.) MEXICO. Junior synonym of praedator: Mayr, 1886b: 118; Borgmeier, 1955: 103.
 * westwoodi. Eciton westwoodi Emery, 1900a: 180 (m.) MEXICO. Junior synonym of praedator: Emery, 1910b: 23; Borgmeier, 1955: 103.
 * emiliae. Eciton (Labidus) praedator subsp. emiliae Mann, 1916: 421 (s.w.) BRAZIL. Junior synonym of praedator: Borgmeier, 1953: 10.
 * guianense. Eciton (Labidus) praedator var. guianense Wheeler, W.M. 1921d: 311 (s.w.) GUYANA. Junior synonym of praedator: Borgmeier, 1953: 19.

Taxonomic Notes
Jack Longino: Borgmeier (1955) recognized two subspecies: praedator s. str. and Labidus praedator sedulus (Menozzi 1926). The type locality of praedator s. str. is Brazil, of sedulus Colombia. The male of praedator s. str. had the frons relatively flat and the mandibles acuminate; the male of sedulus had the frons more elevated and the tip of the mandible obliquely truncate and somewhat emarginate. The soldier of praedator s. str. had the rear margin of the head more or less flat, not deeply emarginate; the soldier of sedulus had the rear margin deeply emarginate. The material examined by Borgmeier showed overlapping or interdigitated ranges. He identified workers of praedator s. str. from Mexico, Belize, Guatemala, Nicaragua, Panama, Peru, Guyana, throughout Brazil, Paraguay, and Argentina; and males from Mexico, Bolivia, Brazil, Paraguay, and Argentina. For sedulus, he identified workers from Costa Rica, Panama, and Colombia; and males from Costa Rica, Panama, Colombia, and Bolivia.

The males I have examined from Costa Rica have the emarginate mandibles of sedulus. The degree of emargination of the head of the soldier depends greatly on the size of the soldier, and I do not trust that character without a more quantitative assessment. Until variation is investigated more thoroughly, I prefer to refer to the Costa Rican material as praedator s. str. and to ignore sedulus until it is better defined.

References based on Global Ant Biodiversity Informatics

 * Alonso L. E., J. Persaud, and A. Williams. 2016. Biodiversity assessment survey of the south Rupununi Savannah, Guyana. BAT Survey Report No.1, 306 pages.
 * Amat-G G., M. G. Andrade-C. and F. Fernández. (eds.) 1999. Insectos de Colombia. Volumen II. Bogotá: Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 433 pp. 131975
 * Antoniazzi R., R. N. S. L. Garoo, W. Dattilo, S. P. Ribeiro, and F. S. Neves. 2019. Ant species richness and interactions in canopies of two distinct successional stages in a tropical dry forest. The Science of Nature 106: 20
 * Araujo Esteves, F., C.R.F. Brandao and K. Viegas. 2008. Subterranean ants (Hymenoptera, Formicidae) as prey of fossorial reptiles (Reptilia, Squamata: Amphisbaenidae) in Central Brazil. Papéis Avulsos de Zoologia (São Paulo) 48(28)
 * Barth, M. B., R. F. Moritz, and F. B. Kraus. 2015. Genetic differentiation at species level in the Neotropical army ant Labidus praedator. Insectes Sociaux 62: 299-306.
 * Battirola, L.E., M.I. Marques, J. Adis and J.H.C. Delabie. 2005. Composicao da comunidade de Formicidae (Insecta, Hymenoptera) em copas de Attalea phalerata Mart. Composic?a?o da comunidade de Formicidae (Insecta, Hymenoptera) em copas de Attalea phalerata Mart. (Arecaceae), no Pantanal de Pocone?, Mato Grosso, Brasil. Revista Brasileira de Entomologia 49(1): 107-117.
 * Bezdeckova K., P. Bedecka, and I. Machar. 2015. A checklist of the ants (Hymenoptera: Formicidae) of Peru. Zootaxa 4020 (1): 101–133.
 * Borgmeier T. 1923. Catalogo systematico e synonymico das formigas do Brasil. 1 parte. Subfam. Dorylinae, Cerapachyinae, Ponerinae, Dolichoderinae. Archivos do Museu Nacional (Rio de Janeiro) 24: 33-103.
 * Borgmeier T. 1948. Einige Ameisen aus Argentinien (Hym. Formicidae). Revista de Entomologia (Rio de Janeiro) 19: 459-471.
 * Borgmeier T. 1953. Vorarbeiten zu einer Revision der neotropischen Wanderameisen. Studia Entomologica 2: 1-51.
 * Borgmeier T. 1955. Die Wanderameisen der neotropischen Region. Studia Entomologica 3: 1-720.
 * Boscardin J., Correa Costa E., J. Garlet, and A. Fiorentini. 2013. Métodos de Captura para Formigas em Pré-plantio de Eucalyptus grandis. Floresta e Ambiente 20(3): 361-370.
 * Boscardin J., J. Garlet, and E. Correa Costa. 2012. Mirmecofauna epigéica (Hymenoptera: Formicidae) em plantios de Eucalyptus spp. (Myrtales: Myrtaceae) na região oeste do estado do Rio Grande do Sul, Brasil. Entomotropica 27(3): 119-128.
 * Bruch C. 1914. Catálogo sistemático de los formícidos argentinos. Revista del Museo de La Plata 19: 211-234.
 * Bruch C. 1921. Estudios mirmecológicos. Revista del Museo de La Plata 26: 175-211.
 * Bustos H., J. 1994. Contribucion al conocimiento de al fauna de hormigas (Hymenoptera: Formicidae) del occidente del Departamento de Narino (Colombia). Bol. Mus. Ent. Univ. Valle 2(1,2):19-30
 * Bustos H., J. and P. Ulloa-Chacon. 1996. Mirmecofauna y perterbacion en un bosque de niebla neotropical (Reserva Natural Hato Viejo, Valle del Cauca, Colombia). Revista Biol. Trop. 44(3):259-266.
 * Castano-Meneses, G., M. Vasquez-Bolanos, J. L. Navarrete-Heredia, G. A. Quiroz-Rocha, and I. Alcala-Martinez. 2015. Avances de Formicidae de Mexico. Universidad Nacional Autonoma de Mexico.
 * Coates-Estrada, R., and A. Estrada. 1989. Avian attendance and foraging at army-ant swarms in the tropical rain forest of Los Tuxtlas, Veracruz, Mexico. Journal of Tropical Ecology 5: 281-292.
 * Correa M. M., W. D. Fernandes, and I. R. Leal. 2006. Ant Diversity (Hymenoptera: Formicidae) from Capões in Brazilian Pantanal: Relationship between Species Richness and Structural Complexity. Neotropical Entomology 35(6): 724-730.
 * Costa-Milanez C. B., G. Lourenco-Silva, P. T. A. Castro, J. D. Majer, and S. P. Ribeiro. 2014. Are ant assemblages of Brazilian veredas characterised by location or habitat type? Braz. J. Biol. 74(1): 89-99.
 * Cuezzo, F. 1998. Formicidae. Chapter 42 in Morrone J.J., and S. Coscaron (dirs) Biodiversidad de artropodos argentinos: una perspectiva biotaxonomica Ediciones Sur, La Plata. Pages 452-462.
 * Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology https://doi.org/10.1002/ecy.2944
 * Davidson, D.W. 2005. Ecological stoichiometry of ants in a New World rain forest. Oecologia 142:221-231
 * Emery C. 1896. Formiche raccolte dal dott. E. Festa nei pressi del golfo di Darien. Bollettino dei Musei di Zoologia ed Anatomia Comparata della Reale Università di Torino 11(229): 1-4.
 * Emery C. 1900. Nuovi studi sul genere Eciton. Memorie della Reale Accademia delle Scienze dell'Istituto di Bologna (5)8: 173-188
 * Emery C. 1906. Studi sulle formiche della fauna neotropica. XXVI. Bullettino della Società Entomologica Italiana 37: 107-194.
 * Esteves F. A., C. R. F. Brandão, and K. Viegas. 2008. Subterranean ants (Hymenoptera, Formicidae) as prey of fossorial reptiles (Reptilia, Squamata: Amphisbaenidae) in Central Brazil. Papeis Avulsos de Zoologia (São Paulo) 48: 329-334.
 * Favretto M. A., E. Bortolon dos Santos, and C. J. Geuster. 2013. Entomofauna from West of Santa Catarina State, South of Brazil. EntomoBrasilis 6 (1): 42-63.
 * Fernandes I., and J. de Souza. 2018. Dataset of long-term monitoring of ground-dwelling ants (Hymenoptera: Formicidae) in the influence areas of a hydroelectric power plant on the Madeira River in the Amazon Basin. Biodiversity Data Journal 6: e24375.
 * Fernandes, P.R. XXXX. Los hormigas del suelo en Mexico: Diversidad, distribucion e importancia (Hymenoptera: Formicidae).
 * Fernández F., E. E. Palacio, W. P. Mackay, and E. S. MacKay. 1996. Introducción al estudio de las hormigas (Hymenoptera: Formicidae) de Colombia. Pp. 349-412 in: Andrade M. G., G. Amat García, and F. Fernández. (eds.) 1996. Insectos de Colombia. Estudios escogidos. Bogotá: Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 541 pp
 * Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
 * Figueiredo C. J. de, R. R. da Silva, C. de Bortoli Munhae, and M. S. de Castro Morini. 2013. Ant fauna (Hymenoptera: Formicidae) attracted to underground traps in Atlantic Forest. Biota Neotrop 13(1):  176-182
 * Flores, C. P., J. A. R. Garza, and A. E. C. Ramirez. 2004. Conocimiento Tlapaneco de hormigas (Hymenoptera: Formicidae) de Malinaltepec, Guerrero, Mexico. Etnobiologia 4: 19-28.
 * Flores-Maldonado K. Y., S. A. Phillips, and G. Sanchez-Ramos. 1999. The myrmecofauna (Hymenoptera: Formicidae) along an altitudinal gradient in the Sierra Madre Oriental of Northeastern Mexico. The Southwestern Naturalist 44(4): 457-461.
 * Flores-Maldonado, K. Y., S. A. Phillips-Jr, and G. Sanchez-Ramos. 1999. The myrmecofauna (Hymenoptera: Formicidae) along an altitudinal gradient in the Sierra Madre Oriental of Northeastern Mexico. The Southwestern Naturalist 44: 457-461.
 * Forel A. 1906. Fourmis néotropiques nouvelles ou peu connues. Annales de la Société Entomologique de Belgique 50: 225-249.
 * Forel A. 1907. Formiciden aus dem Naturhistorischen Museum in Hamburg. II. Teil. Neueingänge seit 1900. Mitt. Naturhist. Mus. Hambg. 24: 1-20.
 * Forel A. 1908. Ameisen aus Sao Paulo (Brasilien), Paraguay etc. gesammelt von Prof. Herm. v. Ihering, Dr. Lutz, Dr. Fiebrig, etc. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien 58: 340-418.
 * Forel A. 1908. Fourmis de Costa-Rica récoltées par M. Paul Biolley. Bulletin de la Société Vaudoise des Sciences Naturelles 44: 35-72.
 * Franco W., N. Ladino, J. H. C. Delabie, A. Dejean, J. Orivel, M. Fichaux, S. Groc, M. Leponce, and R. M. Feitosa. 2019. First checklist of the ants (Hymenoptera: Formicidae) of French Guiana. Zootaxa 4674(5): 509-543.
 * Gallardo A. 1920. Las hormigas de la República Argentina. Subfamilia Dorilinas. Anales del Museo Nacional de Historia Natural de Buenos Aires 30: 281-410.
 * Goitia W., and K. Jaffe. 2009. Ant-Plant Associations in Different Forests in Venezuela. Neotropical Entomology 38(1): 007-031.
 * Gomes E. C. F., G. T. Ribeiro, T. M. S. Souza, and L. Sousa-Souto. 2014. Ant assemblages (Hymenoptera: Formicidae) in three different stages of forest regeneration in a fragment of Atlantic Forest in Sergipe, Brazil. Sociobiology 61(3): 250-257.
 * INBio Collection (via Gbif)
 * Ilha C., J. A. Lutinski, D. Von Muller Pereira, F. R. Mello Garcia. 2009. Riqueza de formigas (Hymenoptera: Formicidae) de Bacia da Sanga Caramuru, municipio de Chapeco-SC. Biotemas 22(4): 95-105.
 * Kempf W. W. 1961. A survey of the ants of the soil fauna in Surinam (Hymenoptera: Formicidae). Studia Entomologica 4: 481-524.
 * Kempf W. W., and K. Lenko. 1976. Levantamento da formicifauna no litoral norte e ilhas adjacentes do Estado de São Paulo, Brasil. I. Subfamilias Dorylinae, Ponerinae e Pseudomyrmecinae (Hym., Formicidae). Studia Entomologica 19: 45-66.
 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * Kusnezov N. 1978. Hormigas argentinas: clave para su identificación. Miscelánea. Instituto Miguel Lillo 61:1-147 + 28 pl.
 * Lapola D. M., and H. G. Fowler. 2008. Questioning the implementation of habitat corridors: a case study in interior São Paulo using ants as bioindicators. Braz. J. Biol., 68(1): 11-20.
 * Lattke J. E., M. Kaspari, S. ODonnell, and S. Powell. 2007. Las hormigas ecitoninas de Venezuela (Hymenoptera: Formicidae: Ecitoninae): elenco preliminar. Entomotropica Vol. 22(3): 153-170.
 * Levings S. C. 1983. Seasonal, annual, and among-site variation in the ground ant community of a deciduous tropical forest: some causes of patchy species distributions. Ecological Monographs 53(4): 435-455.
 * Longino J. T. 2013. Ants of Nicargua. Consulted on 18 Jan 2013. https://sites.google.com/site/longinollama/reports/ants-of-nicaragua
 * Longino J. T., J. Coddington, and R. K. Colwell. 2002. The ant fauna of a tropical rain forest: estimating species richness three different ways. Ecology 83: 689-702.
 * Longino J. et al. ADMAC project. Accessed on March 24th 2017 at https://sites.google.com/site/admacsite/
 * Longino, J.T. 2010. Personal Communication. Longino Collection Database
 * Luederwaldt H. 1918. Notas myrmecologicas. Rev. Mus. Paul. 10: 29-64.
 * Luederwaldt H. 1920. Neue Brasilianische Ameisen. Sa~o Paulo: Weiszflog Irmaos, 14 pp
 * Lutinski J. A., B. C. Lopes, and A. B. B.de Morais. 2013. Diversidade de formigas urbanas (Hymenoptera: Formicidae) de dez cidades do sul do Brasil. Biota Neotrop. 13(3): 332-342.
 * Lutinski J. A., F. R. Mello Garcia, C. J. Lutinska, and S. Iop. 2008. Ants diversity in Floresta Nacional de Chapecó in Santa Catarina State, Brazil. Ciência Rural, Santa Maria 38(7): 1810-1816.
 * Maes, J.-M. and W.P. MacKay. 1993. Catalogo de las hormigas (Hymenoptera: Formicidae) de Nicaragua. Revista Nicaraguense de Entomologia 23.
 * Marinho C. G. S., R. Zanetti, J. H. C. Delabie, M. N. Schlindwein, and L. de S. Ramos. 2002. Ant (Hymenoptera: Formicidae) Diversity in Eucalyptus (Myrtaceae) Plantations and Cerrado Litter in Minas Gerais, Brazil. Neotropical Entomology 31(2): 187-195.
 * Mentone T. O., E. A. Diniz, C. B. Munhae, O. C. Bueno, and M. S. C. Morini. 2011. Composition of ant fauna (Hymenoptera: Formicidae) at litter in areas of semi-deciduous forest and Eucalyptus spp., in Southeastern Brazil. Biota Neotrop. 11(2): http://www.biotaneotropica.org.br/v11n2/en/abstract?inventory+bn00511022011.
 * Mentone T.O., M. S. C. Morini, L. Souza, and S. M. P. Braga. 2009. Hymenoptera communities in an agroecosyste using direct seedling in Southeastern Brazil. Sociobiology 53(2B): 473-486.
 * Miranda P. N., F. B. Baccaro, E. F. Morato, M. A. Oliveira. J. H. C. Delabie. 2017. Limited effects of low-intensity forest management on ant assemblages in southwestern Amazonian forests. Biodivers. Conserv. DOI 10.1007/s10531-017-1368-y
 * Mirmecofauna de la reserva ecologica de San Felipe Bacalar
 * Morini M. S. de C., C. de B. Munhae, R. Leung, D. F. Candiani, and J. C. Voltolini. 2007. Comunidades de formigas (Hymenoptera, Formicidae) em fragmentos de Mata Atlântica situados em áreas urbanizadas. Iheringia, Sér. Zool., Porto Alegre, 97(3): 246-252.
 * Nascimento I. C. do, J. H. C. Delabie, P. S. F. Ferreira, and T. M. C. Della Lucia. 2004. Mating flight seasonality in the genus Labidus (Hymenoptera: Formicidae) at Minas Gerais, in the Brazilian Atlantic forest biome, and Labidus nero, junior synonym of Labidus mars. Sociobiology 44: 615-622.
 * Neves F. S., K. S. Queiroz-Dantas, W. D. da Rocha, and J. H. C. Delabie. 2013. Ants of Three Adjacent Habitats of a Transition Region Between the Cerrado and Caatinga Biomes: The Effects of Heterogeneity and Variation in Canopy Cover. Neotrop Entomol 42: 258268.
 * O'Donnell S., J. Lattke, S. Powell, and M. Kaspari. 2007. Army ants in four forests: geographic variation in raid rates and species composition. Journal of Animal Ecology 76: 580-589.
 * Oliveira Mentone T. de, E. A. Diniz, C. de Bortoli Munhae, O. Correa Bueno and M. S. de Castro Morini. 2012. Composition of ant fauna (Hymenoptera: Formicidae) at litter in areas of semi-deciduous forest and Eucalyptus spp., in Southeastern Brazil. Biota Neotrop 11(2): 237-246.
 * Pacheco R., and H. L. Vasconcelos. 2012. Subterranean Pitfall Traps: Is ItWorth Including Them in Your Ant Sampling Protocol? Psyche doi:10.1155/2012/870794
 * Pic, M. 2001. Fatrores locais estructuradadores da riqueza de especies de formigas arbicolas em Cerrado. Masters Thesis. Universidade Federal de Vicosa.
 * Pires de Prado L., R. M. Feitosa, S. Pinzon Triana, J. A. Munoz Gutierrez, G. X. Rousseau, R. Alves Silva, G. M. Siqueira, C. L. Caldas dos Santos, F. Veras Silva, T. Sanches Ranzani da Silva, A. Casadei-Ferreira, R. Rosa da Silva, and J. Andrade-Silva. 2019. An overview of the ant fauna (Hymenoptera: Formicidae) of the state of Maranhao, Brazil. Pap. Avulsos Zool. 59: e20195938.
 * Puebla-Olivares, F., and K. Winker. 2004. Dieta y dispersion de semillas por dos especies de Tangara (Habia) en dos tipos de vegetacion en los Tuxtlas, Veracruz, Mexico. Ornitologia Neotropical 15: 1-12.
 * Quiroz-Robledo, L.N. and J. Valenzuela-Gonzalez. 2006. Las hormigas Ecitoninae (Hymenoptera: Formicidae) de Morelos, México. Revista Biologia Tropical 54(2):531-552
 * Ramos L. S., R. Z. B. Filho, J. H. C. Delabie, S. Lacau, M. F. S. dos Santos, I. C. do Nascimento, and C. G. S. Marinho. 2003. Ant communities (Hymenoptera: Formicidae) of the leaf-litter in cerrado stricto sensu areas in Minas Gerais, Brazil. Lundiana 4(2): 95-102.
 * Ramos L. de S., R. Zanetti, C. G. S. Marinho, J. H. C. Delabie, M. N. Schlindwein, and R. P. Almado. 2004. Impact of mechanical and chemical weedings of Eucalyptus grandis undergrowth on an ant community (Hymenoptera: Formicidae). Rev. Árvore 28(1): 139-146.
 * Reddell J. R., and J. C. Cokendolpher. 2001. Ants (Hymenoptera: Formicidae) from caves of Belize, Mexico, and California and Texas (U.S.A.) Texas. Texas Memorial Museum Speleological Monographs 5: 129-154.
 * Ribeiro L. F., R. R. C. Solar, T. G. Sobrinho, D. C. Muscardi, J. H. Schoereder, and A. N. Andersen. 2019. Different trophic groups of arboreal ants show differential responses to resource supplementation in a neotropical savanna. Oecologia 190(2): 433-443.
 * Roberts, D.L., R.J. Cooper and L.J. Petit. 2000. Use of Premontane Moist Forest and Shade Coffee Agroecosystems by Army Ants in Western Panama. Conservation Biology 14(1):192-199.
 * Rosa da Silva R. 1999. Formigas (Hymenoptera: Formicidae) do oeste de Santa Catarina: historico das coletas e lista atualizada das especies do Estado de Santa Catarina. Biotemas 12(2): 75-100.
 * Ryder Wilkie K.T., A. L. Mertl, and J. F. A. Traniello. 2010. Species Diversity and Distribution Patterns of the Ants of Amazonian Ecuador. PLoS ONE 5(10): e13146.doi:10.1371/journal.pone.0013146
 * Rylands A. B., M. A. O. M. da Cruz, and S. F. Ferrari. 1989. An association between marmosets and army ants in Brazil. Journal of Tropical Ecology 5(1): 113-116.
 * Salinas P. J. 2010. Catalogue of the ants of the Táchira State, Venezuela, with notes on their biodiversity, biogeography and ecology (Hymenoptera: Formicidae: Amblyioponinae, Ponerinae, Proceratiinae, Myrmicinae, Ecitoninae, Formicinae, Pseudomyrmecinae, Dolichoderinae). Boletín de la SEA 47: 315-328.
 * Sandoval V. E., and G. Zambrano. 2007. Catálogo de las hormigas presentes en el Museo de Historia Natural de la Universidad del Cauca. Taller Editorial de la Universidad del Cauca, Popayán. 60 pp.
 * Santoandre S., J. Filloy, G. A. Zurita, and M. I. Bellocq. 2019. Ant taxonomic and functional diversity show differential response to plantation age in two contrasting biomes. Forest Ecology and Management 437: 304-313.
 * Santschi F. 1916. Formicides sudaméricains nouveaux ou peu connus. Physis (Buenos Aires). 2: 365-399.
 * Santschi F. 1931. Contribution à l'étude des fourmis de l'Argentine. Anales de la Sociedad Cientifica Argentina. 112: 273-282.
 * Schmidt F. A., and R. R. C. Solar. Is it important to collect hypogaeic ants? How to collect them? Biológico, São Paulo 69(2): 267-270.
 * Schmidt, F.A. and R.R.C Solar. 2010. Hypogaeic pitfall traps: methodological advances and remarks to improve the sampling of a hidden ant fauna. Insectes Sociaux 57:261-266.
 * Silva F. H. O., J. H. C. Delabie, G. B. dos Santos, E. Meurer, and M. I. Marques. 2013. Mini-Winkler Extractor and Pitfall Trap as Complementary Methods to Sample Formicidae. Neotrop Entomol 42: 351358.
 * Silva R.R., and C. R. F. Brandao. 2014. Ecosystem-Wide Morphological Structure of Leaf-Litter Ant Communities along a Tropical Latitudinal Gradient. PLoSONE 9(3): e93049. doi:10.1371/journal.pone.0093049
 * Silvestre R., C. R. F. Brandão, and R. R. Silva da 2003. Grupos funcionales de hormigas: el caso de los gremios del cerrado. Pp. 113-148 in: Fernández, F. (ed.) 2003. Introducción a las hormigas de la región Neotropical. Bogotá: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, xxvi + 424 pp.
 * Siqueira de Castro F., A. B. Gontijo, W. Duarte da Rocha, and S. Pontes Ribeiro. 2011. As comunidades de formigas de serapilheira nas florestas semidecíduas do Parque Estadual do Rio Doce, Minas Gerais. MG.BIOTA, Belo Horizonte 3(5): 5-24.
 * Smith M. A., W. Hallwachs, D. H. Janzen. 2014. Diversity and phylogenetic community structure of ants along a Costa Rican elevational gradient. Ecography 37(8): 720-731.
 * Sobrinho T., J. H. Schoereder, C. F. Sperber, and M. S. Madureira. 2003. Does fragmentation alter species composition in ant communities (Hymenoptera: Formicidae)? Sociobiology 42(2): 329-342.
 * Suguituru S. S., D. R. de Souza, C. de Bortoli Munhae, R. Pacheco, and M. S. de Castro Morini. 2011. Diversidade e riqueza de formigas (Hymenoptera: Formicidae) em remanescentes de Mata Atlântica na Bacia Hidrográfica do Alto Tietê, SP. Biota Neotrop. 13(2): 141-152.
 * Suguituru S. S., M. Santina de Castro Morini, R. M. Feitosa, and R. Rosa da Silva. 2015. Formigas do Alto Tiete. Canal 6 Editora 458 pages
 * Suguituru S. S., R. Rosa Silva, D. R. de Souza, C. de Bortoli Munhae, and M. Santina de Castro Morini. Ant community richness and composition across a gradient from Eucalyptus plantations to secondary Atlantic Forest. Biota Neotrop. 11(1): 369-376.
 * Varela-Hernandez, F., M. Rocha-Ortega, R. W. Jones, and W. P. Mackay. 2016. Insectos: Hormigas (Formicidae) del estado de Queretaro, Mexico. Pages 397-404 in W. Jones., and V. Serrano-Cardenas, editors. Historia Natural de Queretaro. Universidad Autonoma de Queretaro, Mexico.
 * Vasquez-Bolanos M. 2011. Checklist of the ants (Hymenoptera: Formicidae) from Mexico. Dugesiana 18(1): 95-133.
 * Vieira Nunes R., W. Dattilo, M. Soares Gigliotti de Carvalho, P. B. Costa das Chagas, and D. Louzada-Silva. 2011. First record of nest alligator with bivouacs of army ants in Brazilian Cerrado. Revista Brasileira de Zoociências 13 (1, 2, 3): 213-219.
 * Vittar, F. 2008. Hormigas (Hymenoptera: Formicidae) de la Mesopotamia Argentina. INSUGEO Miscelania 17(2):447-466
 * Vásquez-Bolaños M. 2011. Lista de especies de hormigas (Hymenoptera: Formicidae) para México. Dugesiana 18: 95-133
 * Watkins II, J.F. 1982.The army ants of Mexico (Hymenoptera: Formicidae: Ecitoninae). Journal of the Kansas Entomological Society 55(2): 197-247.
 * Watkins J. F., II 1976. The identification and distribution of New World army ants (Dorylinae: Formicidae). Waco, Texas: Baylor University Press, 102 pp
 * Wheeler W. M. 1907. A collection of ants from British Honduras. Bulletin of the American Museum of Natural History 23: 271-277.
 * Wheeler W. M. 1921. Observations on army ants in British Guiana. Proceedings of the American Academy of Arts and Sciences 56: 291-328.
 * Wheeler W. M. 1925. Neotropical ants in the collections of the Royal Museum of Stockholm. Arkiv för Zoologi 17A(8): 1-55.
 * Wild, A. L.. "A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)." Zootaxa 1622 (2007): 1-55.
 * Willson, S.L. 2004. Obligate Army-Ant-Following Birds: A Study of Ecology, Spatial Movement Patterns, and Behavior in Amazonian Peru. Ornithological Monographs 55:1-67
 * da Silva R. R., and R. Silvestre. 2000. Diversidade de formigas (Hymenoptera: Formicidae) em Seara, oeste de Santa Catarina. Biotemas 13(2): 85-105.
 * da Silva de Oliveira A. B., and F. A. Schmidt. 2019. Ant assemblages of Brazil nut trees Bertholletia excelsa in forest and pasture habitats in the Southwestern Brazilian Amazon. Biodiversity and Conservation 28(2): 329-344.
 * de Almeida Soares S., Y. R. Suarez, W. D. Fernandes, P. M. Soares Tenorio, J. H. C. Delabie, and W. F. Antonialli-Junior. 2013. Temporal variation in the composition of ant assemblages (Hymenoptera, Formicidae) on trees in the Pantanal floodplain, Mato Grosso do Sul, Brazil. Rev. Bras. entomol. 57: 84-90
 * de Souza D. R., S. G. dos Santos, C. de B. Munhae, and M. S. de C. Morini. 2012. Diversity of Epigeal Ants (Hymenoptera: Formicidae) in Urban Areas of Alto Tietê. Sociobiology 59(3): 703-117.
 * do Nascimento I. C., J. H. C. Delabie, P. S. F. Ferreira, and T. M. C. Della Lucia. 2004.  Mating flight seasonality in the genus Labidus (Hymenoptera: Formicidae) at Minas Gerais, in the Brazilian Atlantic forest biome, and Labidus nero, junior synonym of Labidus mars. Sociobiology. 44: 615-622.
 * do Nascimento, I.C. 2006. Fenologia dos Voos de Acasalamento em Formigas Tropicais