homotypic synonym, validly published under the ICN (Botanical Code), illegitimate name
Porphyrosiphon amplivaginatus (Van Goor 1918) Anagnostidis and Komárek 1988 is illegitimate because it is a homotypic synonym of Leptolyngbya amplivaginata (Van Goor 1918) Anagnostidis and Komárek 1988, which was proposed in the same publication.Publication:
McNeill J, Barrie FR, Buck WR, Demoulin V, Greuter W, Hawksworth DL, Herendeen PS, Knapp S, Marhold K, Prado J, et al. International Code of Nomenclature for Algae, Fungi and Plants (Melbourne Code). Koeltz Scientific Books, Königstein, 2012.