Ruth Nielsen (born 1944), phycologist.

IPNI standard form: R.Nielsen

Taxon names authored

(List may be incomplete)

• 13 taxon names authored by Ruth Nielsen

Publications

(List may be incomplete)

• Nielsen, R. & Pedersen, P.M. 1977. Separation of Syncoryne reinkei nov. gen., nov. sp. from Pringsheimiella scutata (Chlorophyceae, Chaetophoraceae). Phycologia 16(4): 411–416, 25 figs. DOI: 10.2216/i0031-8884-16-4-411.1 Reference page. 
• Nielsen, R. & McLachlan, J. 1986. Acrochaete marchantiae comb. nov. and Trichothyra irregularis gen. et. sp. nov. with notes on other species of small filamentous green algae from St. Lucia (West Indies). Nordic Journal of Botany 6(4): 515–524. DOI: 10.1111/j.1756-1051.1986.tb00908.x Reference page. 
• Nielsen, R. 1988 '1987'. Marine algae within calcareous shells from New Zealand. New Zealand Journal of Botany 25(3): 425–438. DOI: 10.1080/0028825X.1987.10413359 Reference page. 
• Nielsen, R. & Correa, J. 1988 '1987'. A comparative study of Gomontia polyrhiza and Chlorojackia pachyclados gen. et sp. nov. (Chlorophyta). Canadian Journal of Botany 65: 2467–2472. DOI: 10.1139/b87-335 Reference page. 
• Nielsen, R. 1994. New combinations within the genus Colaconema (Acrochaetiaceae, Bangiophyceae). Nordic Journal of Botany 14: 715. Reference page. 

Eponyms

• Ruthnielsenia O’Kelly, B.Wynsor & W.K.Bellows, 2004