Formica nigra

Radchenko et al. (2021) question the placement of this taxon within the genus Formica, noting that F. nigra is too small, with body length of 2.1mm.

Distribution
This taxon was described from.

Nomenclature

 * † nigra. †Formica nigra Presl, 1822: 196, no caste or sex given, BALTIC AMBER (Eocene). [Unresolved junior primary homonym of nigra Linnaeus, 1758: 580 (Bolton, 1995b: 199).]