Morphology of Chrysastrella paradoxa stomatocysts from the Subpolar Urals (Russia) with comments on related morphotypes

Upretia squamulosa, a new lichen species from the arid valley of Jinsha-jiang River, China

Mallomonas papuensis sp. nov. (Chrysophyceae, Synurales), a new species from the high mountain bog pool in Papua province, Indonesia

Description of two new Geissleria species (Bacillariophyta) from Central and West tropical Africa

On Luticola Mann (Bacillariophyceae) in southeastern Brazil: taxonomy, ecology and description of two new species

Staurosirella andino-patagonica sp. nov. (Bacillariophyta) from lake sediments in Patagonia, Argentina

Ending a 175-year taxonomic uncertainty: Description of Staurosirella neopinnata sp. nov. (Bacillariophyta) to accommodate Fragilaria pinnata, a highly misconstrued taxon with a purported worldwide distribution

Neidiopsis borealis sp. nov., a new diatom species from the mountain Shar Planina, Republic of North Macedonia

Tetramphora croatica sp. nov.—A new brackish-water species from Lake Vransko, Croatia

Extreme diversity in fine-grained morphology reveals fourteen new species of conopeate Nitzschia (Bacillariophyta: Bacillariales)