Strumigenys metopia

The two records of this species are from rainforest and a bamboo forest. Both were obtained via litter sampling.

Identification
Bolton (2000) - A member of the crassicornis-complex in the Strumigenys gundlachi group. The minute metopia is the only known species of the crassicornis-complex to possess flagellate hairs on the alitrunk.

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil, Colombia, Ecuador, Panama, Peru.

Nomenclature

 *  metopia. Neostruma metopia Brown, 1959b: 11, fig. 2 (q.) PANAMA. Kempf, 1975a: 417 (w.). Combination in Pyramica: Bolton, 1999: 1672; in Strumigenys: Baroni Urbani & De Andrade, 2007: 124. See also: Bolton, 2000: 190.

Worker
Bolton (2000) - TL 1.5-1.6, HL 0.40-0.41, HW 0.29-0.31, CI 72-75, ML 0.12-0.13, MI 30-31, SL 0.17-0.19, SI 60-63, PW 0.20-0.22, AL 0.38-0.40 (4 measured). Characters of crassicornis complex. Submedian tooth of mandible strongly developed; 3 minute denticles distal of submedian tooth and 2 proximal of it. Scape expanded at subbasal angle (similar to development seen in Strumigenys crassicornis but not as extensive), the scape distinctly broadest at this point, tapering to apex. Apicoscrobal hair curved and elongate. Pair of standing hairs on cephalic dorsum close to occipital margin may be only weakly differentiated from the conspicuous spatulate ground-pilosity. Pronotal humeral hair long and flagellate. Mesonotum with a single pair of long flagellate hairs. Postpetiole in profile swollen, subglobular; spongiform lobes very reduced.

Type Material
Holotype queen (dealate), PANAMA: Barro Colorado Island, 1938, no. 871 (N.A. Weber) (examined).

References based on Global Ant Biodiversity Informatics

 * Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
 * Brandao, C.R.F. 1991. Adendos ao catalogo abreviado das formigas da regiao neotropical (Hymenoptera: Formicidae). Rev. Bras. Entomol. 35: 319-412.
 * Brown W. L. Jr. 1959. A revision of the dacetine ant genus Neostruma. Breviora 107: 1-13.
 * 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.
 * 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.
 * Groc S., J. H. C. Delabie, F. Fernandez, M. Leponce, J. Orivel, R. Silvestre, Heraldo L. Vasconcelos, and A. Dejean. 2013. Leaf-litter ant communities (Hymenoptera: Formicidae) in a pristine Guianese rainforest: stable functional structure versus high species turnover. Myrmecological News 19: 43-51.
 * Groc S., J. Orivel, A. Dejean, J. Martin, M. Etienne, B. Corbara, and J. H. C. Delabie. 2009. Baseline study of the leaf-litter ant fauna in a French Guianese forest. Insect Conservation and Diversity 2: 183-193.
 * Kempf W. W. 1975. Report on Neotropical Dacetine ant studies (Hymenoptera: Formicidae). Revista Brasileira de Biologia 34: 411-424.
 * Mertl A. L., J. F. A. Traniello, K. Ryder Wilkie, and R. Constantino. 2012. Associations of two ecologically significant social insect taxa in the litter of an amazonian rainforest: is there a relationship between ant and termite species richness? Psyche doi:10.1155/2012/312054
 * 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.
 * Silva T. S. R., and R. M. Feitosa. 2019. Using controlled vocabularies in anatomical terminology: A case study with Strumigenys (Hymenoptera: Formicidae). Arthropod Structure and Development 52: 1-26.
 * Sosa-Calvo J., S. O. Shattuck, and T. R. Schultz. 2006. Dacetine ants of Panama: new records and description of a new species. Proceedings of the Entomological Society of Washington 108: 814-821.
 * Sosa-Calvo J., T. R. Schultz, and J. S. LaPolla. 2010. A review of the dacetine ants of Guyana (Formicidae: Myrmicinae). Journal of Hymenoptera Research 19: 12-43.
 * Vasconcelos, H.L., J.M.S. Vilhena, W.E. Magnusson and A.L.K.M. Albernaz. 2006. Long-term effects of forest fragmentation on Amazonian ant communities. Journal of Biogeography 33:1348-1356