Morphological investigation and description of two new Gomphonema Ehrenberg (Bacillariophyta) species from India and Vietnam with biogeographical comments

Description of Placoneis mologaensis, a new diatom from the Rybinsk reservoir on the Volga River, European Russia

New species of Pseudostaurosira (Bacillariophyceae) including a tripolar taxon from mountain streams of Central Mexico

Navicula fontana sp. nov., a new freshwater diatom from a limnocrenic spring in Central Poland

New diatom species Navicula davidovichii from Vietnam (Southeast Asia)

Thomas Radcliffe Comber (1837–1902), his contribution to the diatoms recorded in the Catalogue of African Plants Collected by Dr. Friedrich Welwitsch in 1853–1861 (1898–1901) with notes on nomenclatural issues and biogeographical implications

Luticola puchalskiana, a new small terrestrial Luticola species (Bacillariophyceae) from the Maritime Antarctic Region

Gomphonema frequentiformis (Metzeltin & Krammer) comb. nov. (Bacillariophyta): ecology and taxonomy of a Neotropical diatom

Sellaphora mayrii (Bacillariophyceae), a new diatom from the Argentinean Patagonia

Two multi-stigmate Gomphonema species of Africa: Gomphonema kalahariense (nom. nov., stat. nov.) and Gomphonema chemeron (sp. nov.)