Abstract
A new combination Staurosirella rhombus (Ehrenberg), comb. nov., is based of Fragilaria rhombus. Using light and scanning electron microscopy, the type material from Jastrabá, Slovak Republic was studied. The taxonomic description and typification was done on the basis of the original line drawings, mica preparations and on raw materials, which are housed in the Ehrenberg Collection, Museum für Naturkunde, Humboldt Universität zu Berlin (BHUPM). Comments are presented regarding possible synonyms, described for the Neogene sediments in the realm of Central Slovakia.