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Species: Octostruma triquetrilabrum   Longino, 2013 

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Taxonomic History (provided by Barry Bolton, 2022)

Octostruma triquetrilabrum Longino, 2013b PDF: 53, figs 1A, 3A, 5K, 39, 43 (w.) COSTA RICA. Neotropic. Primary type information: Primary type material: holotype worker. Primary type locality: Costa Rica: Puntarenas, Est. Biol. Los Llanos, nr Santa Elena, 10.30487, -84.83735, ±100 m., 1150 m., 28.ii.2004, #5249-s, moist forest, ex sifted leaf litter (J. Longino). Primary type depository: INBC. Primary type specimen: JTLC000004551. Secondary type information: Secondary type material: 7 paratype workers. Secondary type localities: paratypes with same data as holotype, paratypes Costa Rica: Alajuela, Casa Eladio, Rio Peñas Blancas, 10.31667, -84.71667, ±2 km., 800 m., 10.v.1989, #2529-s (J. Longino), and same data but 23.v.1990, #2701-s (J. Longino). Secondary type depositories: CASC, JTLC, MCZC, MZSP, UCDC, USNM. AntCat AntWiki


A cryptic inhabitant of forest floor leaf litter and rotten wood; from cloud forest of Costa Rica and Panama. // Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Costa Rica, Panama
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Distribution Notes:

Costa Rica, Panama.


Octostruma triquetrilabrum is known from two sites near Monteverde in the Cordillera de Tilarán, and one site in the mountains of western Panama. One Monteverde site is very wet, old-growth montane forest at 800 m on the Atlantic slope, and the other Monteverde site is a small patch of seasonal moist forest at 1150 m, just below the cloud forest on the Pacific slope. All specimens are from Winkler samples of sifted leaf litter.


With the characters of O. wheeleri and O. triangulabrum. Differing from O. wheeleri in the presence of 8-10 spatulate setae on face (6 on O. wheeleri) and shallow reticulate rugulose sculpture on face and dorsal pronotum (nearly smooth on O. wheeleri). Differing from O. triangulabrum in the absence of a pair of spatulate setae on the mesonotum (present in O. triangulabrum); first gastral sternite more uniformly punctate.


The name refers to triangular labrum that is not bilobed at the apex.

Specimen Habitat Summary

Found most commonly in these habitats: 2 times found in Wet forest, 1 times found in moist forest, 1 times found in premontane rainforest.

Found most commonly in these microhabitats: 2 times Ex sifted leaf litter, 1 times ex sifted leaf litter on ground.

Collected most commonly using these methods: 3 times Winkler.

Elevations: collected from 800 - 1150 meters, 897 meters average

Collect Date Range: collected between 1987-07-16 00:00:00.0 and 2004-02-28 00:00:00.0

Type specimens: holotype Octostruma triquetrilabrum Longino 2013: jtlc000004551; paratype Octostruma triquetrilabrum Longino 2013: casent0627377, casent0627378, jtlc000004543, inbiocri001281407, inbiocri001282521, inbiocri001282522, inbiocri001282523

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