Nesomyrmex pittieri ( Forel, 1899 )

Arredondo, Brandon S. & Guerrero, Roberto J., 2025, The ant genus Nesomyrmex Wheeler (Formicidae, Myrmicinae) from the threatened Colombian tropical dry forest: three new species, a new synonymy, and new distributional data, ZooKeys 1232, pp. 131-172 : 131-172

Nesomyrmex pittieri ( Forel, 1899)

Figs 24 , 29

Leptothorax pittieri Forel, 1899: 56. Holotype (worker): Costa Rica. [ MHNG] (AntWeb image examined, CASENT 0908997).

Combination in Leptothorax (Goniothorax) : Emery 1924: 250.

Combination in Leptothorax (Nesomyrmex) : Kempf 1958: 93.

Combination in Nesomyrmex : Bolton 2003: 272.

Worker measurements.

(n = 1) HL 0.81, HW 0.68, SL 0.53, ML 0.33, EL 0.21, PW 0.51, PTW 0.24, PPW 0.36, WL 0.98, PH 0.3, PTL 0.35, PTH 0.26, PPL 0.24, PPH 0.24, GL 0.78. CI 83, SI 78.

Geographic range.

Colombia, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, Panama, Trinidad and Tobago.

Examined material.

Colombia • 1 worker; Valle del Cauca, Jamundí, Vda. San Isidro, Colindres ; 3.33931°N, 76.5413°W; 979 m a. s. l.; 30 Jul. 2021; M. A. Bautista-Giraldo, I. Armbrecht legs.; CBUMAG:ENT:41664 .

Natural history.

Species collected by manual sampling on vegetation in Parque Nacional Natural Tuparro.

Comments.

This species is recognized by the following characters: wide and deep foveae on the dorsal surface of the head, antennal scapes curved at their base, and propodeal spines as long as the distance between their tips.

The only specimen examined shows variation in coloration with respect to specimens from other forest types in Colombia (unpublished data). Populations found in premontane forest show bicoloration, with variations between reddish brown to dark. The sculpture of the frontal area is consistent in all populations (Fig. 24 ).

Figures

Figure 24. Nesomyrmex pittieri worker (CBUMAG: ENT: 41664) A full-face view B lateral view C dorsal view. Scale bars: 0.2 mm (A); 0.5 mm (B, C).

Figure 29. Distributional map of Nesomyrmex species from the tropical dry forest in Colombia.