Formica rufa nigricans

This taxon is not in use as it is currently considered to be a junior synonym of Formica pratensis.

Nomenclature

 * nigricans. Formica pratensis var. nigricans Bondroit, 1912: 352 (w.) SPAIN. [First available use of Formica rufa subsp. pratensis var. nigricans Emery, 1909b: 187; unavailable name.] Subspecies of pratensis: Novak & Sadil, 1941: 105; Boven, 1947: 189. Raised to species: Yarrow, 1955a: 4. Status as species: Betrem, 1960b: 77; Bernard, 1967: 314; Baroni Urbani, 1971c: 220; Paraschivescu, 1972: 534; Collingwood, 1979: 153. Senior synonym of pratensoides, thyssei: Yarrow, 1955a: 4; of cordieri: Betrem, 1962: 38; Kutter, 1965: 140. Junior synonym of pratensis: Dlussky, 1967a: 84; Dlussky & Pisarski, 1971: 177; Kutter, 1977c: 272; Seifert, 1992a: 225.