Strumigenys longispinosa

Longino (Ants of Costa Rica) - Strumigenys longispinosa occurs in lowland wet forest. Workers forage in leaf litter on the forest floor. Weber (1952) observed the nest of the type collection, from Barro Colorado Island, Panama. The nest was in rainforest soil, below the soil cover, and surmounted by a small crater.

Identification
Bolton (2000) - A member of the Strumigenys marginiventris-group. Closely related to Strumigenys incuba and like that species having the postpetiole and gaster unsculptured. However, incuba is larger, has only a single pair of erect hairs on the cephalic dorsum, and has gastral hairs that are not flagellate.

Longino (Ants of Costa Rica) - Apical fork of mandible without intercalary teeth; mandible with one strong preapical tooth; gaster smooth and shining with strong basal costulae; gaster with long flagelliform setae.

Distribution based on Regional Taxon Lists
Neotropical Region: Costa Rica, Ecuador, Panama, Peru.

Biology
Brown (1962) stated this species nests in the soil of tropical forest.

Nomenclature

 *  longispinosa. Strumigenys longispinosa Brown, 1958e: 123, figs. 1, 2 (w.) PANAMA. [Strumigenys longispinosa Weber, 1952b: 3; unavailable name, attributed to Brown.] See also: Bolton, 2000: 542.

Worker
Bolton (2000) - TL 2.8-3.3, HL 0.67-0.82, HW 0.50-0.62, CI 72-76, ML 0.58-0.72, MI 83-90, SL 0.58-0.70, SI 113-120, PW 0.28-0.36, AL 0.66-0.80 (8 measured).

Cephalic dorsum with 2 pairs of erect simple hairs, one near highest point of vertex, the other close to the occipital margin. Flagellate hairs present: in apicoscrobal position; at pronotal humerus; a pair on mesonotum; a few on waist segments; numerous on first gastral tergite. Ventral spongiform strip on petiole narrow, often incomplete, broken or partially absent. Mesopleuron smooth, metapleuron and side of propodeum lightly punctulate at least in part. Propodeal spines long and slender, subtended by a narrow concave carina. Petiole node longer than broad in dorsal view. Disc of postpetiole mostly or entirely smooth, never completely traversed by costulae nor densely reticulate-punctate. First gastral tergite smooth behind basigastral costulae.

Type Material
Bolton (2000) - Holotype and paratype workers, PANAMA: Canal Zone, Barro Colorado Island, 10.vii.1939, No. 1139 (N. A. Weber); paratypes PANAMA: Barro Colorado Island, No. 65-2 (E. C. Williams); Quipo (J. Zetek) [examined].

References based on Global Ant Biodiversity Informatics

 * Alonso L., M. Kaspari, and A. Alonso. 2001. Assessment of the Ants of the Lower Urubamba Region, Peru. Pp 87-93. In: Alsonso A, Dallmeier F, Campbell P, editors. Urubamba: The biodiversity of a Peruvian rainforest. SI/MAB Biodiversity Program-Smithsonian Institution. 204 p.
 * Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
 * Brown W. L. Jr. 1958. The neotropical species of the ant genus Strumigenys Fr. Smith: group of marginiventris Santschi. Journal of the New York Entomological Society 65: 123-128.
 * Brown W. L. Jr. 1962. The neotropical species of the ant genus Strumigenys Fr. Smith: synopsis and keys to the species. Psyche (Cambridge) 69: 238-267.
 * Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
 * 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. et al. ADMAC project. Accessed on March 24th 2017 at https://sites.google.com/site/admacsite/
 * 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.
 * Weber N. A. 1952. Biological notes on Dacetini (Hymenoptera, Formicidae). Am. Mus. Novit. 1554: 1-7.
 * Weber N. A. 1952. Biological notes on Dacetini (Hymenoptera, Formicidae). American Museum Novitates 1554: 1-7.