Formica rufa nuda Karavaiev, 1930 unresolved junior homonym, junior synonym of current valid taxon Formica polyctena Foerster, 1850
Formica (Formica) rufa var. nuda Karavaiev, 1930b: 148 (w.) SWEDEN. Palearctic.
Primary type information: Primary type material: holotype worker. Primary type locality: Sweden: Gotland I., Ardre, no. 82 (H. Lohmander). Primary type depository: SIZK. Type notes: Radchenko et al., 2025: 481, cite 36 syntype workers (CASENT0917340) in SIZK, but the original description cites a holotype worker only.
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