Reference

Anton Hansgirg (1888): De Spirogyra insigni (Hass.) Ktz. nov. var. fallaci, Zygnemate chalybeospermo nov. sp. et Z. rhynchonemate von. sp., adjecto conspctu subgenerum, sectionum subsectionumque generis Spirogyrae Link et Zgnematis (Ag.) De By. – Hedwigia – 27: 253 - 258.