Registration Id: http://phycobank.org/102609

Event: new nomenclatural type

Lectotype: Latvia, Sidrabezers [Sudrabezers Lake], near Riga, alt. 7 m, 57°1'43.87"N, 24°20'45.643"E1 Skuja, H. 1928: Vorarbeiten zu einer Algenflora von Lettland. IV. – Acta Horti Botanici Universitatis Latviensis 2/3: 103-218: t. IV, fig. 4, 5

1. Geo reference and altitude added according to map.

published in: 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

for Cosmarium perforatum var. rotundatum Skuja in Acta Horti Bot. Univ. Latv. 2/3: 164, t. IV, fig. 4, 5. 19282

Registration on 2020-10-09 14:04:46 +0200

2. Cosmarium perforatum var. rotundatum (‘rotundata’) Skuja 1928 is a later homonym of Cosmarium perforatum var. rotundatum (‘rotundata’) Børgesen 1899.