Elachista nielswolffi Svensson, 1976: 203. Type locality: Sweden, Jämtland, Vällista (Svensson 1976: 203). Holotype ♂, in ZMUL.
Subgenus: Elachista; bifasciella species group.
Distribution: Palearctic. Finland, Norway, Russia (European part, Siberia), Sweden.
Larval host plant(s): Deschampsia flexuosa (Poaceae) (Itämies & Mutanen 1995).
Figs.: Svensson (1976), Traugott-Olsen & Nielsen (1977), Kyrki & Karvonen (1981), Itämies & Mutanen (1995).