Zeinab Shariatmadari - PhD Student / Faculty of Biosciences, Shahid Beheshti University, G. C. Tehran, Iran
Hossein Riahi - Professor / Faculty of Biosciences, Shahid Beheshti University, G. C. Tehran, Iran
Shademan Shokravi - Assistant Professor / Faculty of Basic Science, Islamic Azad University, Gorgan, Iran

In a revision of the genus Anabaena Bory ex Bornet et Flahault (Nostocaceae) in terrestrial habitats, ۳۳ specimens belonging to eleven species and one variety were identified. Specimens were collected from ۱۸ paddy field soils located in seven provinces of Iran.  Anabaena sphaerica Bornet et Flahault, A. portoricensis N. L. Gardner, A.  fertilissima C. B. Rao,  A. orientalis Dixitand A. ambigua C. B. Rao are reported as five new records from Iran. An identification key, description and pictures of these species are presented in this study.

Anabaena, Nostocaceae, morphospecies, new record, Paddy Field, Iran