A TAXONOMIC STUDY ON SOIL TAXA OF CYLINDROSPERMUM KÜTZING EX BORNET & FLAHAULT (NOSTOCACEAE) IN IRAN

In the study of the genus Cylindrospermum Kützing ex Bornet & Flahault (Nostocaceae) in terrestrial habitats, 18 specimens belonging to eight species were identified. Specimens were collected from 11 paddy field soils located in seven provinces of Iran. Five taxa, including Cylindrospermum sphaericum B. N. Prasad, Cylindrospermum catenatum (Ralfs) Bornet & Flahault, Cylindrospermum marchicum Lemmermann, Cylindrospermum minutissimum Collins and Cylindrospermum muscicola Kützing ex Bornet & Flahault are considered as new records to Iran. An identification key, description and pictures of these species are presented in this study.