M. foliacea var. nurulislamii Levanets & Janse van Vuuren, 2023: 1, no fig.

Levanets, Anatoliy & Janse van Vuuren, Sanet, 2023, Morphology, taxonomy, biogeography and ecology of Micrasterias foliacea Bailey ex Ralfs (Desmidiales, Zygnematophyceae), PhytoKeys 226, pp. 33-51 : 33

5. M. foliacea var. nurulislamii Levanets & Janse van Vuuren, 2023: 1, no fig.

Micrasterias foliacea var. spinosa Islam & Ashrafi, nom. inval. 2004. "Bangladesh Journal of Plant Taxonomy" 6, Pl. 3, figs 12-14. Basionym.

Remarks.

Islam and Begum (2004) published a paper on Micrasterias Agardh from selected areas of Bangladesh and described a new variety of M. foliacea (var. Micrasterias foliacea spinosa ). This varietal designation was invalid and was not designated in accordance with Art. 40.6 of ICN ( Turland et al. 2018). In addition, the varietal name " Micrasterias foliacea var. spinosa Islam & Ashrafi" was invalid as Micrasterias foliacea var. spinosa Levanets and Guiry (2021) had priority. A new name, in honor of National Professor of Bangladesh, Abul Khayer Mohammed Nurul Islam, was therefore proposed for this variety (Levanets and Janse van Vuuren 2023).

Morphology.

This variety differs from the type because there are numerous spines on the cell wall. The cell wall is covered with many stout, curved spines, unequal in size. The incision between the lobes is usually wide open. Cell length 33-76 μm, width 34.5-77 μm, isthmus 5.0-11.5 μm ( Islam and Begum 2004).

Distribution.

M. foliacea var. nurulislamii was found only once in Bangladesh (Suppl. material 2).

Habitat and ecology.

It was found in a ditch. No ecological information is available.