You have requested access to download the full text of the source (SourceID: 401949):
Krahn, K. J.; Schwarz, A.; Wetzel, C. E.; Cohuo-Durán, S.; Daut, G.; Macario-González, L.; Pérez, L.; Wang, J.; Schwalb, A. (2021). Three new needle-shaped Fragilaria species from Central America and the Tibetan Plateau. Phytotaxa. 479(1): 1-22.