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Van de Vijver, B.; Morales, E. A.; Schuster, T. M.; Wetzel, C. E.; Ector, L. (2022). Typification and morphology of Staurosirella lapponica (Grunow) D.M.Williams & Round and Staurosirella pinnata var. intercedens (Grunow) P.B.Hamilton (Staurosiraceae, Bacillariophyta). Nova Hedwigia. 115(1-2): 31-45.