(1) Apterostigma angustum Lattke, 1997 Figure 2A, BMaterial 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).

{"references": ["Lattke JE (1997) Revision del genero Apterostigma Mayr: (Hymenoptera: Formicidae). Arquivos de Zoologia 34 (5): 121 - 221. https: // doi. org / 10.11606 / issn. 2176 - 7793. v 34 i 5 p 121 - 221", "Serna F, Mackay W (2010) Adescriptive morphology of the Ant Ge- nus Procryptocerus (Hymenoptera: Formicidae). Journal of In- sect Science 10 (111): 1 - 36. https: // doi. org / 10.1673 / 031.010.11101", "Fernandez F, Sendoya S (2004) Synonymic list of Neotropical ants (Hymenoptera: Formicidae). Biota Colombiana 5 (1): 3 - 105."]}

Published as part of 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, pp. 1205-1227 in Check List 16 (5) on page 1208, DOI: 10.15560/16.5.1205, http://zenodo.org/record/4059086