文摘
m>Cladophora koktschetavensism> is a filamentous freshwater alga of the order Cladophorales that has been described from Lake Shchuchie in Central-Northern Kazakhstan, which is currently the only known location of this species. Habitat and morphological characteristics of the type material of m>C. koktschetavensism> strongly overlap with those of m>Aegagropila linnaeim>, and molecular sequences of ribosomal genes are virtually identical (small subunit (SSU) and large subunit (LSU) ribosomal RNA (rRNA) genes, internally transcribed spacer region 2 (ITS2)). Morphological and molecular evidence strongly suggests that the two species are conspecific, thus m>C. koktschetavensism> is proposed as a taxonomic synonym of m>A. linnaeim>. The sequence of the highly variable ITS2 region was a perfect match to m>A. linnaeim> ribotype A. This ribotype had been shown previously to be widespread in the Northern Hemisphere, with most records from Japan and a few findings in Europe, Iceland and North America. The finding in Kazakhstan fills the gap between Japan and Europe in the disjunct distribution of this ribotype.
