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Species: Typhlomyrmex prolatus   Brown, 1965 

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Taxonomic History (provided by Barry Bolton, 2021)

Typhlomyrmex prolatus Brown, 1965c PDF: 72, fig. 6 (q.) COSTA RICA. Neotropic. Primary type information: Type-material: holotype queen. Type-locality: Costa Rica: vic. San José, 1940 (H. Schmidt). Type-depository: MZSP. AntCat AntWiki HOL

Taxonomic history

Status as species: Kempf, 1972b PDF: 256; Bolton, 1995b: 422.
// Distribution


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

Distribution Notes:

Costa Rica (Central Valley, Atlantic slope), Nicaragua.


Worker and queen with a distinctive longitudinal carina on the anterior third of third abdominal segment (postpetiole).


Longino notes, 26 Feb 2014:

This species was described from a single holotype queen, collected by Schmidt in the vicinity of San Jose in 1940. The diagnosis from Brown (1965) is as follows:

A medium-sized Typhlomyrmex with unusually elongate, narrowly subtriangular mandibles; basal border short and curving broadly into long, indistinctly denticulate masticatory border; apical tooth very long and acute. Petiolar node as seen from above broader than long, with feebly concave (almost straight) anterior border and strongly concave posterior border. Postpetiole with a distinct, sharp median longitudinal carina on the anterior third of its dorsal surface.

Additional description included the measurements HL 0.72, HW (without eyes) 0.63, SL 0.52.

Workers are now known that have the dorsal carina on the third abdominal segment. On these workers, the basal margin of the mandible curves into the masticatory margin, but the mandible is not strongly falcate.


Brown, W. L., Jr. 1965. Contributions to a reclassification of the Formicidae. IV. Tribe Typhlomyrmecini (Hymenoptera). Psyche (Camb.) 72:65-78.

Specimen Habitat Summary

Found most commonly in these habitats: 2 times found in mature wet forest.

Found most commonly in these microhabitats: 2 times ex sifted leaf litter.

Collected most commonly using these methods: 2 times miniWinkler.

Elevations: collected from 40 - 360 meters, 200 meters average

Collect Date Range: collected between 2011-05-07 and 2012-05-11

Type specimens: holotype: jtl008069

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