Closterium navicula f. knysnaense Levanets & Janse van Vuuren, 2024

Levanets, Anatoliy & Unit, Sanet Janse van Vuuren, 2024, Taxonomy and nomenclature of desmid names (Desmidiales, Zygnematophyceae) described by G. Huber-Pestalozzi from Knysna Forest in South Africa, Notulae Algarum 318, pp. 1-2 : 1

Closterium navicula f. knysnaense Levanets & Janse van Vuuren , nom. nov.

Basionym: Penium navicula f. majus Huber-Pestalozzi Zeitschrift für Botanik 23: 472, no fig. ( ‘ major ’), nom. illeg., 1930 (priority for Penium navicula f. majus Borzęcki 1920: 6 , pl. 1: fig. 12 ( ‘ major ’), non Penium navicula [ var. crassum ] f. majus Borzęcki 1920: 6 , pl. 1: fig. 13).

Registration: http://phycobank.org/104330

Type locality: South African Union [now Republic of South Africa], Knysna-forest, pond (swamp) in Deep Walls (Forest Research), on the road to the forestry experimental station. Pond is about 25 m in diameter and 20 to 40 cm deep, heavily overgrown with Potamogeton and other hydrophytes, no Sphagnum , leg. G. Huber-Pestalozzi, October 1926.

Note: We have concluded that this form should be referred to Closterium navicula (Brébisson) Lütkemüller to which it is morphologically related.