Probolomyrmex guanacastensis

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Probolomyrmex guanacastensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Proceratiinae
Tribe: Probolomyrmecini
Genus: Probolomyrmex
Species: P. guanacastensis
Binomial name
Probolomyrmex guanacastensis
O'Keefe & Agosti, 1998

Probolomyrmex guanacastensis casent0104673 profile 1.jpg

Probolomyrmex guanacastensis casent0104673 dorsal 1.jpg

Specimen labels

At a Glance • Ergatoid queen  


This species has been collected in sifted debris processed through a modified Berlese-Tulgren funnel from riparian habitat in Costa Rica. This is the only record of an ergatoid queen in this genus. The presence of an ergatoid queen in Probolomyrmex is unexpected, because species with ergatoid queens normally have large colonies (Peeters, 1997). It is noteworthy that the term “ergatoid” was applied here by the authors of the species. It remains to be confirmed if the specimen was in fact a reproductive female.


Oliveira & Feitosa (2019) - Postero-ventral lobe of petiole short and rounded. Subpetiolar process weakly developed. First gastral segment with prora and a dorsal protuberance on the posterior region of gaster.

Probolomyrmex guanacastensis is similar to Probolomyrmex boliviensis but is smaller and has shorter antennal scapes.

Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



The ergatoid female has eyes and ocelli, unlike workers (O'Keefe & Agosti 1997). Body sizes are very similar.


The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • guanacastensis. Probolomyrmex guanacastensis O'Keefe & Agosti, 1998: 191, figs. 1-4 (w.q.) COSTA RICA.

Type Material