Pseudomyrmex schuppi

Luederwaldt (1926) recorded P. schuppi nesting under epiphytes. De Oliveira et al. (2015), studying ant occupancy of Cecropia trees in southwest Bahia, Brazil, found a colony of  nesting in a Cecropia pachystachya tree.

Identification
Ward (1989) - P. schuppi is diagnosed minimally by its relatively large size (HW > 0.81) and high, broad petiole (PU > 0.93, PWI > 0.84) whose dorsum is smoothly rounded in lateral profile. Also characteristic of P. schuppi are the conspicuous elevation of the basal face of the propodeum above the level of the mesonotum and the posterior displacement of the postpetiolar node as seen in lateral view. These last two features are shared with Pseudomyrmex oculatus, from which P. schuppi is distinguished by petiole shape and differences in relative eye length.

Distribution
Known from Argentina, Brazil and Paraguay.

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

Nomenclature

 * confusior. Pseudomyrma schuppi var. confusior Forel, 1901d: 299 (w.) BRAZIL. Junior synonym of schuppi: Kempf, 1961a: 380.
 *  schuppi. Pseudomyrma schuppi Forel, 1901d: 298 (w.) BRAZIL. Kempf, 1961a: 381 (q.); Wheeler, G.C. & Wheeler, J. 1973d: 207 (l.). Combination in Pseudomyrmex: Kempf, 1961a: 380. Senior synonym of confusior, geraensis: Kempf, 1961a: 380. See also: Ward, 1989: 426.
 * geraensis. Pseudomyrma schuppi var. geraensis Forel, 1912g: 23 (w.) BRAZIL. Junior synonym of schuppi: Kempf, 1961a: 380.

Type Material
Ward (1989):
 * Pseudomyrmex schuppi. Syntype workers, Silo Leopoldo, Rio Grande do Sui, Brazil (Schupp) [Examined].
 * Pseudomyrma schuppi var. confusior. Syntype workers, Rio Grande do Sui, Brazil (Schupp) [Examined].
 * Pseudomyrma schuppi var. geraensis. Syntype workers, Juiz de Fora, Minas Gerais. Brazil (Sampaio) [Examined].

Worker
Ward (1989) - measurements (n=14). HL 0.96-1.18. HW 0.82-0.93, MFC 0.023-0.038. CI 0.79-0.88. OI 0.55-0.64, REL 0.52-0.56. REL2 0.62-0.67. OOI 0.23-0.60, VI 0.75-0.84, FCI 0.026-0.042, SI 0.45-0.48, SI2 0.68-0.76, FI 0.39-0.45. PDI 1.16-1.34, MPI 0.037-0.053. NI 0.53-0.62. PLI 0.94-1.07, PWI 0.85-0.99, PPWI 1.32-1.60.

diagnosis. Relatively large species (HW 0.82-0.93), with broad head (CI 0.79-0.89), and eyes of moderate size; sides of head broadly convex, rounding into the occipital margin which varies from flat to slightly concave; funicular segments II and III about as long as broad (FLI 1.71-2.12, n=9). Fore femur, metanotal groove, propodeum, and postpetiole similar to those of Pseudomyrmex oculatus (q. v.), except basal and declivitous faces of propodeum tend to be more clearly differentiated. Petiolar node high and broadly rounded in lateral view (PLI 0.94-1.07), very broad in dorsal view (PWI 0.85-0.99), with relatively strong dorsolateral margination; anteroventral process of petiole conspicuous, tooth-like, often bluntly recurved.

Head densely punctate, opaque; mesosoma obscurely punctate to coriarious-imbricate, opaque to subopaque; petiole, postpetiole, and gaster subopaque, covered with numerous fine piligerous punctures. Erect pilosity and appressed pubescence common and conspicuous on most parts of the body including the mesosoma dorsum. Body medium to dark brown. the antennae and tarsi (and sometimes mandibles and promesonotum) lighter in color.

References based on Global Ant Biodiversity Informatics

 * 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
 * Arruda F. V., M. A. Pesquero, D. G. Marcelino, G. A. Leiter, J. H. C. Delabie, and R. Fagundes. 2015. Size and condition of bamboo as structural factors behind the vertical stratification of the bamboo-nesting ant community. Insectes Sociaux DOI 10.1007/s00040-015-0440-4
 * Brandao C. R. F., F. A. Esteves, and L. P. Prado. 2010. A catalogue of the Pseudomyrmecinae ant type specimens (Hymenoptera, Formicidae) deposited in the Museu de Zoologia da Universidade de Sao paulo, Brazil. Papeis Avulsos de Zoologia 50(45): 693-699.
 * Bruch C. 1914. Catálogo sistemático de los formícidos argentinos. Revista del Museo de La Plata 19: 211-234.
 * Coelho M. S., G. W. Fernandes, J. C. Santos, and J. H. C. Delabie. 2009. Ants (Hymenoptera: Formicidae) as bioindicators of land restoration in a Brazilian Atlantic forest fragment. Sociobiology 54(1): 51-63.
 * 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.
 * Fernandes T. T., R. R. Silva, D. Rodrigues de Souza-Campana, O. Guilherme Morais da Silva, and M. Santina de Castro Morini. 2019. Winged ants (Hymenoptera: Formicidae) presence in twigs on the leaf litter of Atlantic Forest. Biota Neotropica 19(3): http://dx.doi.org/10.1590/1676-0611-bn-2018-0694
 * Forel A. 1906. Fourmis néotropiques nouvelles ou peu connues. Annales de la Société Entomologique de Belgique 50: 225-249.
 * Forel A. 1911. Die Ameisen des K. Zoologischen Museums in München. Sitzungsber. Math.-Phys. Kl. K. Bayer. Akad. Wiss. Münch. 11: 249-303.
 * Forel A. 1912. Formicides néotropiques. Part IV. 3me sous-famille Myrmicinae Lep. (suite). Mémoires de la Société Entomologique de Belgique. 20: 1-32.
 * Gallardo A. 1932. Las hormigas de la República Argentina. Subfamilia Mirmicinas, sección Promyrmicinae. Anales del Museo Nacional de Historia Natural de Buenos Aires 37: 37-87.
 * Kempf W. W. 1961. Estudos sôbre Pseudomyrmex. III. (Hymenoptera: Formicidae). Studia Entomologica 4: 369-408.
 * 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.
 * Menozzi C. 1926. Neue Ameisen aus Brasilien. Zoologischer Anzeiger. 69: 68-72.
 * Nascimento Santos M., J. H. C. Delabie, and J. M. Queiroz. 2019. Biodiversity conservation in urban parks: a study of ground-dwelling ants (Hymenoptera: Formicidae) in Rio de Janeiro City. Urban Ecosystems https://doi.org/10.1007/s11252-019-00872-8
 * Neves F. S., R. F. Braga, M. M. do Espirito-Santo, J. H. C. Delabie, G. Wilson Fernandes, and G. A. Sanchez-Azofeifa. 2010. Diversity of Arboreal Ants In a Brazilian Tropical Dry Forest: Effects Of Seasonality and Successional Stage. Sociobiology 56(1): 1-18.
 * 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.
 * Reis P. C. J., W. D. Darocha, L. Falcao, T. J. Guerra, and F. S. Neves. 2013. Ant Fauna on Cecropia pachystachya Trécul (Urticaceae) Trees in an Atlantic Forest Area, Southeastern Brazil. Sociobiology 60(3): 222-228.
 * 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.
 * 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.
 * Santos M. S., J. N. C. Louzada, N. Dias, R. Zanetti, J. H. C. Delabie, and I. C. Nascimento. 2006. Litter ants richness (Hymenoptera, Formicidae) in remnants of a semi-deciduous forest in the Atlantic rain forest, Alto do Rio Grande region, Minas Gerais, Brazil. Iheringia, Sér. Zool., Porto Alegre, 96(1): 95-101.
 * 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
 * Ulyssea M. A., and C. R. F. Brandao. 2013. Ant species (Hymenoptera, Formicidae) from the seasonally dry tropical forest of northeastern Brazil: a compilation from field surveys in Bahia and literature records. Revista Brasileira de Entomologia 57(2): 217224.
 * Ulyssea M.A., C. E. Cereto, F. B. Rosumek, R. R. Silva, and B. C. Lopes. 2011. Updated list of ant species (Hymenoptera, Formicidae) recorded in Santa Catarina State, southern Brazil, with a discussion of research advances and priorities. Revista Brasileira de Entomologia 55(4): 603-611.
 * Ulysséa M. A., C. R. F. Brandão. 2013. Ant species (Hymenoptera, Formicidae) from the seasonally dry tropical forest of northeastern Brazil: a compilation from field surveys in Bahia and literature records. Revista Brasileira de Entomologia 57(2): 217-224.
 * Vittar, F. 2008. Hormigas (Hymenoptera: Formicidae) de la Mesopotamia Argentina. INSUGEO Miscelania 17(2):447-466
 * Ward, P. S. 1989. Systematic Studies on Pseudomyrmecine Ants: Revision of the Pseudomyrmex Oculatus and P. Subtilissimus Species Groups with Taxonomic Comments on Other Species. Questiones Entomologicae 25: 393-468
 * Wild, A. L. "A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)." Zootaxa 1622 (2007): 1-55.
 * 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