On the morphology and distribution of a rare diatom species Chamaepinnularia gandrupii in Russia

Chamaepinnularia salina (Bacillariophyta), a new diatom species from French mineral springs (Massif Central)

“…Similar variability in the valve shape is reported for C. gandrupii. For this species, several morphotypes are observed with, for example, three slight undulations (Lange-Bertalot & Metzeltin 1996, Genkal & Yarushina 2018. For Microcostatus turritus, valves are elliptical to elliptical-lanceolate .…”

“…Around the valve apices, areolae on the mantle are continuous externally and internally. In C. gandrupii, striae are composed of a multiseriate pore field, located internally between thickened costae and continue without interruption around the apices (Genkal & Yarushina 2018). In C. gerlackei, striae are interrupted by a hyaline line starting from the central area and terminating several striae below the valve apices, and internally, this line is visible as a rib-like structure inside the alveoli.…”

“…Indeed, the species was present in mineral springs such as Sail and Camuse springs characterized by a high electrolyte content unlike the other comparable Chamaepinnularia species (Table 3). Indeed, C. gandrupii is a freshwater species present in oligotrophic waterbodies and watercourses (Genkal & Yarushina 2018). Chamaepinnularia gerlackei was observed in soil samples in Northeast Antarctic Peninsula, South Shetland Islands, South Orkney Islands and South Georgia.…”