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

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

Two new species of Nitzschia (Bacillariaceae, Bacillariophyta) from tropical reservoirs of southeastern Brazil

Description of five new species of the diatom genus Luticola (Bacillariophyta, Diadesmidaceae) found in lakes of James Ross Island (Maritime Antarctic Region)

First Report and New Freshwater Species of Germainiella (Bacillariophyta) from the Maolan Nature Reserve, Guizhou Province, China

Notes on the genus Petroplacus (Bacillariophyceae) with new nomenclature transfer

Oricymba sagarensis (Gandhi) comb. nov., an endemic diatom from the Western Ghats, India

Achnanthidium neotropicum sp. nov., a new freshwater diatom from Lake Apastepeque in El Salvador (Central America)

Tiny diatoms Minidiscus vodyanitskiyi sp. nov. (Bacillariophyta) from the Sea of Azov and consideration of polygonal areolae pattern

Gomphonema wuyiensis sp. nov., a new freshwater species (Bacillariophyceae) from Wuyi Mountains, China