Formica tenuis Fabricius, 1804: 405 (w.) GUYANA. Neotropic.

Primary type information: Primary type material: lectotype worker (by designation of Ward, 1989a: 444). Primary type locality: lectotype Guyana: Essequibo (Smidt). Primary type depository: ZMUC. Type notes: 1) Locality data provided by Ward, 1989a: 444; original data: “Habitat in America meridionali. Dom. Smidt. Mus. Dom. de Sehestedt”. 2) According to Zimsen, 1964: 425, there is also 1 specimen in ZMUK.