Akin to Nodosilinea nodulosa, distinguished from it by pseudobranched filaments and its occurrence on wetted sand. Different from any other representatives of the genus Nodosilinea by its phylogenetic position based on 16S rRNA and 16S-23S ITS rRNA gene phylogenies, p-distance analysis, and differences in secondary structures of Box-B helices.
Description:—In liquid medium form macroscopic, blue-green loose aggregates floating on the surface or settle to the bottom of the glass. In agar plate strain forms a tight blue-green mat. In natural populations filaments are quite long, occasionally slightly waved, mostly unbranched, rarely with single pseudobranchings. Nodules present—up to 4 μm wide in low light in the culture only. Sheaths soft, thin, colorless, adherent to the edges of the cells, sometimes widened, hyaline. Trichomes are distinct constricted at the cross walls, with cells dividing throughout the trichome length. Cells in natural populations are elongate, in cultures shorter to longer than wide 1.2–2.1 μm long (on the ends of trichomes longer than in the middle parts), 1.2–1.7 μm wide, blue-green, pale blue-green when old, often with one prominent granule per cell. At the end of trichomes cells are rounded, similar to intercalary cells. Hormogonia and necridic cells are (rare) presented.
https://doi.org/10.11646/phytotaxa.442.2.2
