New insights into the morphology, taxonomy and geographical distribution of Pleurotaenium subcoronulatum (Zygnematophyceae, Desmidiales) Author Levanets, Anatoliy 0000-0002-6665-1290 Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2520, South Africa 20868421@nwu.ac.za Author Vuuren, Sanet Janse Van 0000-0001-5361-9905 Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2520, South Africa sanet.jansevanvuuren@nwu.ac.za text Phytotaxa 2024 2024-06-25 655 2 144 158 http://dx.doi.org/10.11646/phytotaxa.655.2.3 journal article 301661 10.11646/phytotaxa.655.2.3 c1f66891-bd36-4e01-966a-67e0a44580c9 1179-3163 13212948 4. Pleurotaenium subcoronulatum f. majus M.F. Rich 1935: 128 , no fig. (as “ major ”) Type locality: Zimbabwe , large pool or “pan” at Old N’gamo [now Gamu, Matabeleland North Province ], over an acre in extent, the water in the deeper portions was more than waist-deep and contained a dense tangle of aquatic and semiaquatic vegetation (floating filamentous algae and plankton, as well as epiphytic algae growing on Utricularia and Naias ), 3000 feet [ 914.4 m ] a.s.l., pH 7.3m , collected by Miss E . L . Stephens, July 3, 1930 . Description: The semicells of this taxon are much wider than any forms previously described, the width across the basal swelling measuring 55 μm. The cell wall is punctated, and the crown of tubercles correspond to that of the type . Distribution: Africa: Zimbabwe ( Rich 1935 ).