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Species: Octostruma batesi   (Emery, 1894) 

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Taxonomic History (provided by Barry Bolton, 2019)

Rhopalothrix batesi Emery, 1894d PDF: 218, pl. 1, fig. 11 (w.) BRAZIL. Neotropic. AntCat AntWiki HOL

Taxonomic history

Combination in Octostruma: Brown, 1949f PDF: 92.
See also: Longino, 2013 PDF 23.


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Bolivia, Brazil, Ecuador, Peru
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Distribution Notes:

Brazil (Amazonas), Ecuador, Bolivia.


The holotype of O. batesi closely matches three MCZC collections, 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 are smaller: HW 0.65, HL 0.59, CI 110. Measurements for one worker each from the three MCZC collections are HW 0.53–0.60, HL 0.50–0.55, CI 107–111.

Octostruma batesi is very similar to the widespread O. 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 O. 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."

Specimen Habitat Summary

Found most commonly in these habitats: 1 times found in steep and rocky 2° forest with few 1° trees, 2 times found in second-growth rainforest, 1 times found in Bamboo forest.

Found most commonly in these microhabitats: 2 times sifted litter (leaf mold, rotten wood), 1 times leaf litter, 1 times ex sifted leaf litter.

Collected most commonly using these methods: 3 times Winkler, 1 times berlese.

Elevations: collected from 289 - 1000 meters, 600 meters average

Type specimens: syntype of Octostruma batesi: casent0904968

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