Octostruma batesi

Nothing is known about the biology of .

Identification
Octostruma batesi is very similar to the widespread Octostruma betschi of the Amazonian lowlands, the latter differing in the presence of appressed spatulate setae on the scape and a somewhat more concave face. Octostruma batesi, O. betschi, and Octostruma stenognatha are all similar in size and head shape and possibly form a clade. Although geographic coverage is poor, the known specimens form an allopatric or parapatric replacement series in South America. However, the provenance of the holotype of O. batesi is uncertain. The type locality, in the original publication and on the specimen, is simply "Amazonas." (Longino 2013)

Distribution
Brazil (Amazonas), Ecuador, Bolivia. (Longino 2013)

Distribution based on Regional Taxon Lists
Neotropical Region: Bolivia, Brazil, Ecuador, French Guiana, Guyana, Suriname.

Nomenclature

 *  batesi. Rhopalothrix batesi Emery, 1894c: 218, pl. 1, fig. 11 (w.) BRAZIL. Combination in Octostruma: Brown, 1949f: 92. See also: Brown & Kempf, 1960: 201; Hölldobler & Wilson, 1986: 17.

Worker
Brown and Kempf (1960) - Holotype: TL 2,8, HL 0.64, HW 0.71 (CI 111), WL 0.78 mm. This species is similar to Octostruma balzani, but is a little larger and has more conspicuous, rounded lateral flanges on the occipital lobes behind the compound eyes. Also, the scapes are not so strongly lobiform at the basal angle. We know batesi from only the single holotype worker, so it is impossible to be sure of the status of the species. It could even be an extreme form of balzani. The female is needed before the relationships of this species can be properly assessed.

Longino (2013) - The holotype of O. batesi closely matches three collections I have examined, two from the Andean foothills in Ecuador and one from the Andean foothills in Bolivia. The type is slightly larger than any of the other specimens. Brown and Kempf (1960) examined the holotype and provided measurements HW 0.71, HL 0.64, WL 0.78, CI 111. Measurements of the holotype using the AntWeb image were smaller: HW 0.65, HL 0.59, CI 110. Measurements for one worker each from the three MCZ collections are HW 0.53–0.60, HL 0.50–0.55, CI 107–111.

Type Material
Longino (2013) - Holotype worker: Brazil, Amazonas (AntWeb image examined, CASENT0904968).

References based on Global Ant Biodiversity Informatics

 * 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.
 * Longino J. T. 2013. A revision of the ant genus Octostruma Forel 1912 (Hymenoptera, Formicidae). Zootaxa 3699(1): 1-61.
 * Santschi F. 1931. Fourmis de Cuba et de Panama. Revista de Entomologia (Rio de Janeiro). 1: 265-282.