Xenomyrmex stollii

City of Guatemala. A certain number of workers with their larvae and pupae, associated with a formicary of Camponotus abscisus, in an enormous oakgall (Dr. Stoll).

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil, Guatemala, Mexico.

Biology
Wheeler (1931), for the synonymized subspecies mexicanus - Described from three specimens taken by Dr. Elisabeth Skwarra in an epiphyte, Tillandsia balbisiana Schult. fil. at Mirador (Zacuapam), in the State of Veracruz, Mexico.

Nomenclature

 *  stollii. Xenomyrmex stollii Forel, 1885a: 370 (w.) GUATEMALA. Senior synonym of mexicanus, nodosus: Creighton, 1957c: 10.
 * mexicanus. Xenomyrmex stolli subsp. mexicanus Wheeler, W.M. 1931a: 134 (w.) MEXICO. Wheeler, G.C. & Wheeler, J. 1960b: 20 (l.). Junior synonym of stollii: Creighton, 1957c: 10.
 * nodosus. Xenomyrmex stolli subsp. nodosus Creighton, 1953e: 2, fig. 1 (w.q.) MEXICO. Junior synonym of stollii: Creighton, 1957c: 10.

Worker
Wheeler (1931) - Length 2-2.3 mm.

Mandibles smooth and shining, with a few scattered punctures. Entire body, including the head, low and depressed. Epinotum with rounded basal surface passing through a curve into the declivous surface.

There are a few short, longitudinal rugae on the cheeks, the sides of the clypeus and the sides of the front. All the remainder of the body entirely smooth and very shining, with a few scattered punctures. Some very sparse, erect hairs on all parts of the body. Scapes and legs with moderately abundant, subappressed pilosity. Pubescence absent. Deep chestnut brown, nearly black, thorax often paler. Pedicel, legs, scapes, base of funiculus and especially the mandibles and tarsi paler, reddish brown.

References based on Global Ant Biodiversity Informatics

 * Achury R., and A.V. Suarez. 2017. Richness and composition of ground-dwelling ants in tropical rainforest and surrounding landscapes in the Colombian Inter-Andean valley. Neotropical Entomology https://doi.org/10.1007/s13744-017-0565-4
 * 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.
 * Branstetter M. G. and L. Sáenz. 2012. Las hormigas (Hymenoptera: Formicidae) de Guatemala. Pp. 221-268 in: Cano E. B. and J. C. Schuster. (eds.) 2012. Biodiversidad de Guatemala. Volumen 2. Guatemala: Universidad del Valle de Guatemala, iv + 328 pp
 * Creighton W. S. 1957. A study of the genus Xenomyrmex (Hymenoptera, Formicidae). American Museum Novitates 1843: 1-14.
 * Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology https://doi.org/10.1002/ecy.2944
 * Fernandes, P.R. XXXX. Los hormigas del suelo en Mexico: Diversidad, distribucion e importancia (Hymenoptera: Formicidae).
 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * Pereira Souza J. L., F. Beggiato Baccaro, V. Lemes Landeiro, E. Franklin, W. E. Magnusson, P. Aurelio, C. Lima Pequeno, and I. Oliveira Fernandes. 2015. Taxonomic sufficiency and indicator taxa reduce sampling costs and increase monitoring effectiveness for ants. Diversity and Distributions 1-12. DOI: 10.1111/ddi.12371
 * Rico-Gray,V., J.G. Garcia-Franco, M. Palacios-Rios, C. Diaz-Castelazo, V. Parra-Tabla and J.A. Navarro. 1998. Geographical and Seasonal Variation in the Richness of Ant-Plant Interactions in Mexico. Biotropica 30(2):190-200.
 * Vásquez-Bolaños M. 2011. Lista de especies de hormigas (Hymenoptera: Formicidae) para México. Dugesiana 18: 95-133
 * Wheeler W. M. 1901. The compound and mixed nests of American ants. Part II. The known cases of social symbiosis among American ants. American Naturalist. 35: 513-539.
 * Wheeler W. M. 1931. Neotropical ants of the genus Xenomyrmex Forel. Revista de Entomologia (Rio de Janeiro) 1: 129-139.