Shadman Shokravi - Assistant Professor / Dep. Biology, Faculty of Science, Islamic Azad University, Branch Gorgan, Iran
Roghayeh Siahbalaie - Master of Science / Faculty of Science, Isfahan University, Isfahan, Iran
Sara Jorjani - Master of Science / Faculty of Science, Islamic Azad University, Branch Gorgan, Gorgan, IranMaster of Science
Neda Soltani - Associate Professor / Research Institute of Science, ACECR, Shahid Beheshti University, Tehran, Iran

In this study, a new morphospecies, Hapalosiphon fontinalis (C. Agardh) Bornet (Stigonemataceae, Stigonematales) is reported for Iran. Identification was done in a multidisciplinary way including morphological variations in relation to pH and carbon dioxide concentration fluctuations at limited irradiance (۲ μE m-۲ s-۱). Regarding biological versatility of Cyanophyta, it has been tried to emphasize on the most prominent traits for identification and determination. A new description of the species has been presented regarding morphological characterization in Golestan Province.

CYANOPHYTA, Hapalosiphon, Iran, Paddy-Field, Taxonomy