Pachycondyla curiosa

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Pachycondyla curiosa
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Pachycondyla
Species: P. curiosa
Binomial name
Pachycondyla curiosa
Mackay, W.P. & Mackay, E.E., 2010

This species is known only from the type specimen.


From Mackay and Mackay (2010): The costulae, which cover most surfaces of P. curiosa, could cause confusion with members of the genus Gnamptogenys. Pachycondyla curiosa can be separated as the costulae are not as well developed and regular as they are in Gnamptogenys and costulae are lacking on the postpetiole and the third tergite of the gaster of P. curiosa, which are normally covered with costulae in members of Gnamptogenys. The frontal carinae are narrowed as in other Pachycondyla, not widely spaced as in Gnamptogenys. The mandibles of P. curiosa are typical of those of Pachycondyla and are not narrowed and elongated as they are in many species of Gnamptogenys.

The presence of the costulae would separate P. curiosa easily from most of the other species in Pachycondyla. The costulae on the head of P. curiosa could cause confusion with species such as Neoponera lineaticeps and Pachycondyla striata, but both of these species have well defined carinae on the shoulder of pronotum. Species that have short antennal scapes, including Cryptopone mirabilis, Neoponera luteola, and members of the crenata species complex (e.g. Neoponera crenata), lack the costulae found in P. curiosa. Thus it is unlikely that this species would be confused with any other member of the genus in Pachycondyla.


Known only from the type locality.

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



Only known from a dealate holotype specimen.


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

  • curiosa. Pachycondyla curiosa Mackay & Mackay, 2010: 295, figs. 423, 424 (q.) BRAZIL.

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



Workers are not known for this species.


The female is a small (total length 7.5 mm) reddish black specimen with brown mandibles, antennae, appendages and gaster. The mandibles have approximately 10 teeth. The anterior margin of the clypeus is slightly convex. The head length is 1.50 mm; the head width is 1.32 mm. The eye (maximum diameter 0.40 mm) is located approximately one diameter from the anterior margin of the head. The ocelli are small (diameter of median ocellus 0.05 mm, lateral ocellus 0.06 mm) and are located about 3 - 4 diameters from each other. The scape is short (length 1.05 mm) and does not reach the posterior lateral margin of the head. The sides of the head are convex, but nearly parallel, the posterior margin is only slightly concave. The pronotal carina is absent, the propodeal spiracle is slit-shaped. The node of the petiole is nearly rectangular-shaped, but slightly wider near the base. The subpetiolar process and the metasternal process

cannot be seen due to glue. The postpetiole is slightly angulate between the two faces. The stridulatory file is present but poorly developed on the second pretergite. The arolium is poorly developed.

Erect hairs are present on the mandibles, clypeus, dorsal and ventral surfaces of the head, sides of the head, posterior margin, shaft of the scape, mesosoma, petiole and gaster, the hairs on the legs are mostly suberect. Most surfaces have sparse fine golden appressed pubescence, especially on the mesosoma and petiole The mandibles are mostly smooth and shining, but with deep elongated punctures. The dorsum of the head has fine costulae, which diverge posteriorly; the dorsum of the pronotum has mostly transverse costulae, which become semicircular posteriorly and pass horizontally on the side of the pronotum. The mesopleuron has mostly horizontal costulae, the costulae on the dorsal face of the propodeum are transverse, horizontal on the posterior face and oblique on the side of the pronotum. The dorsum of the petiole has transverse costulae, which become mostly horizontal on the side, the costulae on the anterior and posterior faces are horizontal. The gaster is mostly smooth and glossy, but with coarse punctures.


Males are not known for this species.

Type Material

BRAZIL: Amazonas; Rio Taruma Mirim-Igapó. Holotype dealate female Los Angeles County Museum of Natural History.


From Latin, curiosus, meaning odd or strange, indicating the tenuous relationship of this species with the rest of the genus.


  • Mackay, W. P., and E. E. Mackay 2010. The Systematics and Biology of the New World Ants of the Genus Pachycondyla (Hymenoptera: Formicidae). Edwin Mellon Press, Lewiston. Information from this publication is used with permission from the authors.