Apterostigma pilosum, Mayr, 1859

Mera-Rodríguez, Daniela, Serna, Francisco, Sosa-Calvo, Jeffrey, Lattke, John & Rabeling, Christian, 2020, A checklist of the non-leaf-cutting fungus-growing ants (Hymenoptera, Formicidae) from Colombia, with new biogeographic records, Check List 16 (5), pp. 1205-1227 : 1213

(15) Apterostigma pilosum species complex

Figure 5E, F

Material examined. COLOMBIA: Antioquia • 5 workers; Amalfi; 06°55′00″N, 075°04′00″W; alt. 1045 m; 25 Jun. 1997; F. Sernaleg.; UNAB 5453 ; Antioquia • 2 workers; Amalfi; 06°46′39″N, 075°05′22″W; alt. 1550 m; 30 Jul. 1997; F. Sernaleg.; MEFLG 40843 ; Antioquia • 1 worker; Santafé de Antioquia; 06°33′41″N, 075°49′45″W; alt. 600 m; 06 Oct. 2000; E. Vergara, F. Sernaleg.; UNAB 5453 ; Tolima • 1 worker; Armero; 05°01′55″N, 074°53′27″W; alt. 261 m; 12 Apr. 2012; G. Villamizar leg.; UNAB 5453 .

Identification. The Apterostigma pilosum species-complex needs athorough taxonomic revision. Lattke (1997) provides a general diagnosis for the putative species in the complex: eyes with 5–6 ommatidia along the mi- nor axis; mesopleural ventral carina present or absent but never prominent, lamelliform, nor thick and shin- ing; frontal lobes in cephalic dorsal view triangular or uniformly convex; anterolateral mesonotal prominence absent; and dorsal postpetiolar profile in lateral view strongly curved. The above specimens all agree with this diagnosis.

Distribution. The species of the Apterostigma pilosum complex are widely distributed in Central and South America, ranging from Tamaulipas in Mexico south to Buenos Aires, Argentina.

Figures

Figure 5. Apterostigma and Cyphomyrmex species encountered in Colombia.A, B. Apterostigma reburrum, CASENT0901686/ R. Perry.C, D. Apterostigma robustum, CASENT0904977/ Z. Lieberman. E, F. Apterostigma pilosum complex, CASENT0603533/ A. Nobile. G, H. Cyphomyrmex cornutus, CASENT0923103/ W. Lee. Photographs obtained from the Antweb database (http://www.antweb.org).