Probolomyrmex petiolatus

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Probolomyrmex petiolatus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Proceratiinae
Tribe: Probolomyrmecini
Genus: Probolomyrmex
Species: P. petiolatus
Binomial name
Probolomyrmex petiolatus
Weber, 1940



Specimen Label (compared with type)

The holotype of P. petiolatus was collected among leaves and humus on the rainforest floor in Panama.


Oliveira & Feitosa (2019) - Postero-ventral lobe of petiole long and subquadrate. Subpetiolar process well developed and subrectangular. Prora and dorsal protuberance on posterior region of first gastral tergite absent.

The subrectangular shape of the subpetiolar process makes this species similar to Probolomyrmex dentinodis. However, the latter has a pair of petiolar teeth, the postero-ventral lobe of the petiole is short and rounded, and there are a prora and dorsal protuberance on the gaster.

Agosti (1994) - This species is easily recognized by the subpetiolar process.

Taylor (1965) - The worker of P. petiolatus differs from that of the sympatric Probolomyrmex angusticeps in its smaller size, with relatively broad head, much shorter scapes, and shorter, more compact petiolar node. The unknown worker of Probolomyrmex boliviensis is undoubtedly similar to P. angusticeps in these features.


Distribution based on Regional Taxon Lists

Neotropical Region: Brazil, Colombia, Ecuador, Guatemala, Mexico, Panama (type locality), Venezuela.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb





The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • petiolatus. Probolomyrmex petiolatus Weber, 1940b: 76, fig. 1 (w.) PANAMA. Agosti, 1995: 433 (q.). See also: Taylor, 1965d: 363; Brown, 1975: 57.

Type Material

  • Holotype, worker, Barro Colorado Island, Panama Canal Zone, Panama, 30 June 1938, N.A. Weber, Weber 906-32203, Museum of Comparative Zoology; see Oliveira & Feitosa (2019).

Taxonomic Notes

There is a Brazilian record in the literature for this species (Delabie et al. 2001), but these were described as a new species, Probolomyrmex dentinodis, by Oliveira & Feitosa (2019).

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



Taylor (1965) - The unique holotype worker of this species has the following dimensions: HL, 0.51 mm.; HW, 0.36 mm.; SL, 0.29 mm.; CI, 71; SI, 81; WL, 0.65 mm.; PW, 0.27 mm.; dorsal petiole width, 0.14 mm.; petiolar node index, 52; petiole height, 0.27 mm.; petiolar node length, 0.23 mm.; lateral petiolar index, 85. Weber's original description adequately characterises this distinctive species.

Agosti (1994) - HL 0.51-0.64, HW 0.35-0.40, SL 0.31-0.41, TL 0.66-0.88, CI 63-69, SI 70, (2 examined).


Agosti (1994) - HL 0.61, HW 0.42, SL 0.44, TL 0.90. CI 70, SI 104, (1 examined).