Cyanobacterial strain ARC8 was isolated from seepage coming into the river Dračice, Františkov, Czech Republic, and was characterized using a polyphasic approach. Strain ARC8 showed a typical Nostoc-like morphology and in-depth morphological characterization indicated that it is a member of the genus Nostoc. Furthermore, in the 16S rRNA gene phylogeny inferred using Bayesian inference, maximum likelihood and neighbour joining methods, strain ARC8 clustered within the Nostoc sensu stricto clade. The phylogenetic distance and the positioning of strain ARC8 also indicated that it is a member of the genus Nostoc. Furthermore, the rbcL gene phylogeny along with the 16S-23S ITS secondary structure analysis also supported the findings from the 16S rRNA gene tree. In accordance with the International Code of Nomenclature for Algae, Fungi and Plants we describe a novel species of Nostoc with the name Nostoc neudorfense sp. nov.

Centre for Polar Ecology Faculty of Science University of South Bohemia České Budějovice Czechia

Laboratory of Cyanobacterial Systematics and Stress Biology Department of Botany Institute of Science Banaras Hindu University Varanasi India

National Centre for Microbial Resource Pune India

Phycology Centre Institute of Botany Academy of Science CR Třeboň Czechia

Ramniranjan Jhunjhunwala College Ghatkopar Mumbai India

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