Acromyrmex lundii

Acromyrmex lundii is a host species of the workerless inquiline.

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina, Brazil, Paraguay, Uruguay.

Biology


Römer and Roces (2015) carried out a laboratory study examining this ant's nesting behavior. They noted that it was already known that Acromyrmex lundi leaf-cutting ants:

. . . enlarge existing chambers only if they contain fungus; otherwise they excavate tunnels (Fröhle and Roces 2009). They appear to use their voluminous fungus as a template to adjust the size and shape of the nest chambers (Fröhle and Roces 2009). In addition, it was recently demonstrated that the presence of brood and fungus at a given site triggers the excavation of new nest chambers (Römer and Roces 2014). The brood of A. lundi was shown to be attractive to workers, which aggregate around these items and thereby increase local ant density (Römer and Roces 2014). This locally increased worker density was thought to be responsible for increased excavation activity at the site of brood placement, as compared to alternative sites without brood. The occurrence of brood at a site also led to a change in the shape of the excavated structure, which was round and chamber-like, as compared to a tunnel-like structure excavated at a site without brood (Römer and Roces 2014).

This suggests that the presence of in-nest stores can influence the internal architecture of a nest through a self-organized, likely worker aggregation based adjustment of digging activity. Their study tried to assess how the presence of nest contents (brood and fungus) influenced digging /nest-enlargement behavior in groups of workers placed in a tunnel structure versus a tunnel with a small chamber. They summarized their results as follows: Taken together, our results indicate that the adjustment of both nest size and internal architecture does not simply depend on the number of workers that inhabit a colony. The mechanisms underlying the determination of nest size are flexible and are affected by the available nest space and the presence of in-nest stores. They involve positive and negative feedback loops, such as worker aggregation around stored items and inhibition via the generated space, thus leading to a self-regulated onset and lessening of excavation. The extent of local worker density also influences the internal nest architecture, as ants create cavities when excavating in a concentrated manner, and tunnels when they are more dispersed. Another important mechanism by which ants dynamically adjust the size of their nests is the opportunistic deposition of excavated soil pellets at unused spaces, effectively downsizing their nest.

Barrera et al. (2015) studied the diversity of leaf cutting ants along a forest-edge-agriculture habitat gradient. Their study site, in Chaco Serrano of Central Argentina, had forest remnants of various sizes within an agriculture area with wheat, soy and maize. A. lundii was the moderately abundant (21% of the 162 Acromyrmex colonies sampled). This species was found in the forest interior but was much less abundant there than Acromyrmex crassispinus. Along the forest edge it was similar in abundance to Acromyrmex striatus, with A. crassispinus also present but occurring at a slightly lower abundance. A few colonies of Acromyrmex heyeri and Acromyrmex silvestrii were also found along the forest edge. Ten Acromyrmex nets were found within 5m of the forest edge but none were sampled 25m from the forest edge in the croplands.

Association with Other Organisms

 * The ascomycetous yeast species Wickerhamomyces spegazzinii has been isolated from the fungus garden of this species (Masiulionis & Pagnocca, 2016).
 * The ascomycetous yeast species Wickerhamomyces spegazzinii has been isolated from the fungus garden of this species (Masiulionis & Pagnocca, 2016).
 * The ascomycetous yeast species Wickerhamomyces spegazzinii has been isolated from the fungus garden of this species (Masiulionis & Pagnocca, 2016).

Nomenclature

 *  lundii. Myrmica lundii Guérin-Méneville, 1838: 206 (q.m.) BRAZIL. Roger, 1863a: 201 (w.); Forel, 1885a: 356 (w.); Wheeler, G.C. 1949: 675 (l.). Combination in Atta: Roger, 1863a: 200; in Atta (Acromyrmex): Forel, 1885a: 356; in Acromyrmex: Forel, 1913l: 237. Senior synonym of bonariensis: Gallardo, 1916d: 331; of risii: Santschi, 1925a: 384; of dubia: Gonçalves, 1961: 150. See also: Bruch, 1921: 192. Current subspecies: nominal plus boliviensis, carli, decolor, parallelus.
 * bonariensis. Atta (Acromyrmex) pubescens var. bonariensis Emery, 1905c: 52 (w.) ARGENTINA. Combination in Acromyrmex: Bruch, 1914: 216. Subspecies of lundii: Bruch, 1914: 216; Santschi, 1925a: 385. Junior synonym of lundii: Gallardo, 1916d: 331; Gonçalves, 1961: 150.
 * dubia. Atta (Acromyrmex) laticeps var. dubia Forel, 1908c: 350 (w.) BRAZIL. Combination in Acromyrmex: Emery, 1924d: 349. Subspecies of lundii: Santschi, 1925a: 385. Junior synonym of lundii: Gonçalves, 1961: 150.
 * risii. Atta (Acromyrmex) lundii var. risii Forel, 1908c: 350. (w.) ARGENTINA. Combination in Acromyrmex: Forel, 1913l: 237. Junior synonym of lundii: Santschi, 1925a: 384.

References based on Global Ant Biodiversity Informatics

 * Bollazzi, M., J. Kronenbitter and F. Roce. 2008. Soil Temperature, Digging Behaviour, and the Adaptive Value of Nest Depth in South American Species of Acromyrmex Leaf-Cutting Ants. Oecologia 158(1):165-175
 * Bonetto A. A. 1959. Las hormigas "cortadoras" de la Provincia de Santa Fé (generos: Atta y Acromyrmex). Santa Fé, Argentina: Ministerio de Agricultura y Ganadería (Dirección General de Recurzos Naturales), 79 pp.
 * Bruch C. 1914. Catálogo sistemático de los formícidos argentinos. Revista del Museo de La Plata 19: 211-234.
 * Cantarelli, E.B., E.C. Costa, L.d Silva Oliveira and E.R. Perrando. 2005. EFEITO DE DIFERENTES DOSES DO FORMICIDA "CITROMAX" NO CONTROLE DE Acromyrmex lundi check for this species in other resources (HYMENOPTERA: FORMICIDAE). Ciência Florestal, Vol. 15, No. 3, 2005, pp. 249-253.
 * 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.
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 * Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
 * Fleck M. D., E. Bisognin Cantarelli, and F. Granzotto. 2015. Register of new species of ants (Hymenoptera: Formicidae) in Rio Grande do Sul state. Ciencia Florestal, Santa Maria 25(2): 491-499.
 * Fonseca, R.C. and E. Diehl. 2004. Riqueze de formigas (Hymenoptera, Formicidae) epigeicas em povoamentos de Eucalyptus spp. (Myrtaceae) de diferentes idades no Rio Grande do Sul, Brasil. Revista Brasileira de Entomologia 48(1):95-100.
 * 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.
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 * Forel A. 1913. Fourmis d'Argentine, du Brésil, du Guatémala & de Cuba reçues de M. M. Bruch, Prof. v. Ihering, Mlle Baez, M. Peper et M. Rovereto. Bulletin de la Société Vaudoise des Sciences Naturelles. 49: 203-250.
 * Fowler H. G. 1985. Leaf-cutting ants of the genera Atta and Acromyrmex of Paraguay (Hymenoptera, Formicidae) Dtsch. Ent. Z., N. F. 32(1-3): 19-34.
 * Gallardo A. 1916. Notes systématiques et éthologiques sur les fourmis attines de la République Argentine. Anales del Museo Nacional de Historia Natural de Buenos Aires 28: 317-344.
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 * Klingenberg, C. and C.R.F. Brandao. 2005. The type specimens of fungus growing ants, Attini (Hymenoptera, Formicidae, Myrmicinae) deposited in the Museu de Zoologia da Universidade de Sao Paulo, Brazil. Papeis Avulsos de Zoologia 45(4):41-50
 * Kusnezov N. 1956. Claves para la identificación de las hormigas de la fauna argentina. Idia 104-105: 1-56.
 * Kusnezov N. 1978. Hormigas argentinas: clave para su identificación. Miscelánea. Instituto Miguel Lillo 61:1-147 + 28 pl.
 * Loiacono M. S., C. B. Margaria, and D. A. Aquino. 2013. Diapriinae wasps (Hymenoptera: Diaprioidea: Diapriidae) associated with ants (Hymenoptera: Formicidae) in Argentina. Psyche http://dx.doi.org/10.1155/2013/320590
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 * Osorio Rosado J. L, M. G. de Goncalves, W. Drose, E. J. Ely e Silva, R. F. Kruger, and A. Enimar Loeck. 2013. Effect of climatic variables and vine crops on the epigeic ant fauna (Hymenoptera: Formicidae) in the Campanha region, state of Rio Grande do Sul, Brazil. J Insect Conserv 17: 1113-1123.
 * Pignalberi C. T. 1961. Contribución al conocimiento de los formícidos de la provincia de Santa Fé. Pp. 165-173 in: Comisión Investigación Científica; Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina) 1961. Actas y trabajos del primer Congreso Sudamericano de Zoología (La Plata, 12-24 octubre 1959). Tomo III. Buenos Aires: Librart, 276 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.
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 * Santschi F. 1925. Revision du genre Acromyrmex Mayr. Revue Suisse de Zoologie 31: 355-398.
 * Solomon S. E., C. Rabeling, J. Sosa-Calvo, C. Lopes, A. Rodrigues, H. L. Vasconcelos, M. Bacci, U. G. Mueller, and T. R. Schultz. 2019. The molecular phylogenetics of Trachymyrmex Forel ants and their fungal cultivars provide insights into the origin and coevolutionary history of ‘higher-attine’ ant agriculture. Systematic Entomology 44: 939–956.
 * Valdes-Rodriguez S., P. Chacon de Ulloa, and I. Armbrecht. 2014. Soil ant species in Gorgona Island, Colombian Pacific. Rev. Biol. Trop. 62 (1): 265-276.
 * Vittar, F. 2008. Hormigas (Hymenoptera: Formicidae) de la Mesopotamia Argentina. INSUGEO Miscelania 17(2):447-466
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