Primary type information:
Primary type material: syntype workers (number not stated). Primary type locality: Italy: “Habitat in Italia. D. Allioni”. Primary type depository: ZMUK.
Type notes:
1) Zimsen, 1964: 424, cites 2 specimens in ZMUK. 2) Olivier, 1792: 492, says that Formica didyma, “ressemble à la Fourmi fauve” (Formica rufa).