Strumigenys borgmeieri

Known from forest, forest edge and disturbed habitats ("under board in lawn"). Longino (Ants of Costa Rica) reports: "borgmeieri is known from few collections. The holotype is from Tapera, Pernambuco, Brazil. I collected a worker in a Winkler sample, sifted litter from the forest floor, in a patch of riparian forest surrounded by pastures, Finca La Pacifica, Guanacaste Province, Costa Rica. The species has also been collected twice at La Selva Biological Station, from forest floor leaf litter."

Identification
Bolton (2000) - A member of the cordovensis complex in the Strumigenys mandibularis-group. The structure of the relatively short mandibles and form of the gastral pilosity isolate this species. Whilst being a member of the cordovensis complex it is not obviously closely related to any other known species.

Longino (Ants of Costa Rica) - Apical fork of mandible with a single intercalary tooth; mandible with two conspicuous preapical teeth; head very narrow; propodeal lamellae with dorsal and ventral teeth or angles; body covered with short spatulate hairs.

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil, Colombia, Costa Rica, Honduras, Mexico, Panama.

Nomenclature

 *  borgmeieri. Strumigenys borgmeieri Brown, 1954l: 57 (w.) BRAZIL. See also: Bolton, 2000: 531.

Worker
Bolton (2000) - TL 3.0-3.3, HL 0.71-0.74, HW 0.48, CI 65-68, ML 0.44-0.50, MI 62-66, SL 0.48-0.51, SI 100-105, PW 0.34, AL 0.72-0.77 (2 measured). Characters of cordovensis-complex and its mandibles the shortest in the complex (MI > 85 in other species). Mandibles in full-face view broadest subbasally, evenly tapering to apices; their outer margins more or less parallel at full closure, not diverging anteriorly from base. Both preapical teeth short-spiniform, close together, and located in the apical fifth of the mandible length. Distance between proximal and distal preapical teeth less than the length of the latter. Head in full-face view with sides behind the convex eyes only very weakly divergent posteriorly, almost parallel. Gland bullae elongate, proximal of midlength on dorsal surfaces of middle and hind femora. Propodeal declivity with a moderately broad lamella that bears a weak triangular prominence at top and bottom. Ventral spongiform strip of petiole narrow, beneath the peduncle its maximum depth less than half the peduncle depth. Petiole and postpetiole reticulate-punctate, the former as long as broad or slightly longer than broad in dorsal view. Lateral lobe of petiole narrow, merely an extension of the posterior collar and not extending forward along the side of the node. Ventral lobe of postpetiole thin and leaf-like, triangular, lamellate rather than spongiform. Basigastral costulae coarse, longer than disc of postpetiole. Ground-pilosity conspicuous on head and alitrunk, coarse, curved and apically spatulate. Propodeal dorsum with a longitudinal row of posteriorly curved spatulate hairs on each dorsolateral margin. Much stouter erect hairs that are flattened and expanded apically are distributed as follows: one in apicoscrobal position; a pair on cephalic dorsum close to occipital margin; one at pronotal humerus; a medially-inclined pair on mesonotum. First gastral tergite with one pair to many suberect stout hairs that are flattened and expanded apically, sometimes appearing clavate. Some to most of these hairs may be appressed, but this could be an artifact.

Type Material
Bolton (2000) - Holotype worker, BRAZIL: Pernambuco, Tapera (Pickel) [examined].

References based on Global Ant Biodiversity Informatics

 * Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
 * Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology https://doi.org/10.1002/ecy.2944
 * 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.
 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * Longino J. T. L., and M. G. Branstetter. 2018. The truncated bell: an enigmatic but pervasive elevational diversity pattern in Middle American ants. Ecography 41: 1-12.
 * 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/
 * Santos P. P., A. Vasconcelos, B. Jahyny, and J. H. C. Delabie. 2010. Ant fauna (Hymenoptera, Formicidae) associated to arboreal nests of Nasutitermes spp. (Isoptera, Termitidae) in a cacao plantation in southeastern Bahia, Brazil. Revista Brasileira de Entomologia 54(3): 450-454.
 * 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
 * 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.
 * 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.