Apterostigma angustum Lattke, 1997

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 : 1208

(1) Apterostigma angustum Lattke, 1997

Figure 2A, B

Material examined. COLOMBIA: Antioquia • 4 work- ers; Amalfi; 06°46′66″N, 075°06′42″W; alt. 1045 m; 25 Jun. 1997; F. Sernaleg.; UNAB 4365 ; Antioquia • 6 workers; Amalfi; 06°51′26″N, 075°07′32″W; alt. 1000 m; 30 Jul. 1997; F. Sernaleg.; MEFLG 5786 ; Antioquia • 2 workers; Amalfi ; 06°45′42.43″N, 075°05′28.31″W; alt. 1221 m; Sep. 2006; M. A. Vanegas leg.; MEFLG 11086 ; Antioquia • 2 workers; Santafé de Antioquia; 06° 33′41″N, 075°49′54″W; alt. 600 m; 06 Oct. 2000; E. Ver- gara, F. Sernaleg.; UNAB 4738 ; Antioquia • 12 gy- nes, 20 workers; Amalfi; 06°51′26″N, 075°07′32″W; alt. 1000 m; 30 Jul. 1997; F. Sernaleg.; MEFLG 5786 ; Atlántico • 1 worker; Juan de Acosta; 10°46′02″N, 075° 02′34″W; alt. 117–250 m; Feb.–May 2012; J. Castro, S. Royero leg.; UNAB 5457 ; Caquetá • 8 workers; Floren- cia; 01°37′11″N, 075°36′14″W; alt. 300 m; 31 Mar. 2016; F. Sernaleg.; UNAB 4365 ; Chocó • 1 worker; Lloró; 05° 29′00″N, 076°32′00″W; alt. 115 m; 04 Mar. 2001; J. Neita leg.; UNAB 4366 ; Chocó • 4 workers; Lloró; 05°29′00″N, 076°32′00″W; alt. 115 m; 03 Nov. 2000; J. Neita leg.; UNAB 4366 ; Sucre • 1 worker; Ovejas; 09°32′4.1″N, 075° 13′18.5″W; alt. 277 m; 4 Feb. 2016; H. Cadena leg.; ME- FLG 40895 .

Identification. Frontal lobes in frontal view triangular; general cephalic profile in lateral view ovoid; compound eyes relatively small; and ventral mesopleural carina (epicnemial carina of Serna and Mackay 2010) absent ( Lattke 1997).

Distribution. The specimens found in Colombia are all new records for the country as well as a major range ex- pansion to the west ( Fig. 1A ) as Apterostigma angustum was only known from Venezuela and French Guiana ( Lattke 1997; Fernández and Sendoya 2004).

Figures

Figure 1. Geographic distribution of non-leaf-cutting fungus-growing ant species in Colombia. A. Apterostigma pilosum species-group. B. Genus Cyphomyrmex. C. Apterostigma auriculatum species-group, and genera Mycocepurus, Myrmicocrypta, and Mycetomoellerius. D. Genera Sericomyrmex and Paratrachymyrmex.

Figure 2. Apterostigma species encountered in Colombia. A, B. Apterostigma angustum, J. Sosa-Calvo. C–H. Figures taken by M. Esposito obtained from the Antweb database (http://www.antweb.org). C, D. Apterostigma auriculatum, CASENT0922035. E, F. Apterostigma bolivianum, CASENT0922036. G, H. Apterostigma carinatum, CASENT0922038.