Morphology and molecular phylogeny of representatives of the genus Coelastrella Chodat from the Urals and Khentei mountain systems
Five strains of the genus Coelastrella were studied from the collections of live cultures of algae of the Institute of Biology, Syktyvkar, Russia (SYKOA Ch-045-09, SYKOA Ch-047-11, SYKOA Ch-072-17) and the Siberian Institute of Plant Physiology and Biochemistry, Irkutsk, Russia (IRK-A 2, IRK-A 173). It was found that, despite their high morphological similarity, the strains have different phylogenetic relationships. The analysis of the 18S rDNA and ITS1-ITS2 showed that the studied strains belong to the species: C. terrestris (IRK-A 173), C. oocystiformis (SYKOA Ch-045-09; IRK-A 2) and C. aeroterrestrica (SYKOA Ch-047-11). The SYKOA Ch-072-17 strain is probably a new species for the genus. The results confirm the high phenotypic variability and hidden diversity among the representatives of this group of green algae.