Cosmarium perforatum var. rotundatum Skuja
Cosmarium perforatum var. rotundatum in Acta Horti Bot. Univ. Latv. 2/3: 164, t. IV, fig. 4, 5. 1928, nom. illeg.1,2
is replaced synonym for Cosmarium perforatum var. skujae in Memoranda Soc. Fauna Fl. Fenn. 21: 56. 1945
1. Art. 53.1; Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.-H., Li, D.-Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (eds.) 2018: International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code), adopted by the Nineteenth International Botanical Congress, Shenzhen, China, July 2017. Regnum Vegetabile 159. – Glashütten: Koeltz Botanical Books, 2. Cosmarium perforatum var. rotundatum (‘rotundata’) Skuja 1928 is a later homonym of Cosmarium perforatum var. rotundatum (‘rotundata’) Børgesen 1899., 3. Shyndanovina, I. 2020: Cosmarium tutum nom. nov. a new name for Cosmarium perforatum var. skujae (Charophyta, Desmidiaceae), a rare taxon newly found in Ukraine. – Phytotaxa 461(4): 243-253. http://doi.org/10.11646/phytotaxa.461.4.2 Registration: http://phycobank.org/102609, 2020-10-09, 4. Geo reference and altitude added according to map.