New morphospecies of Phormidium and Microcoleus (Cyanophyta) in paddy-fields of Iran

Cyanophyta of some paddy-fields of Golestan province (North of Iran, near the Caspian Sea) have been studied during 2006–07. Phormidium subinerusatum, P. tenue, P. jadinianum, P. purpurascens, P. lucidum, P. fragile, Microcoleus palaodus, M. lacustris are new records for Golestan province and Iran. Results showed that P. subinerusatum, P. tenue were dominant in all stations. P. fragile, in spring and M. palaodus, M. lacustris, in autumn and winter were not visible in any station. Morphological characteristics of these species are described in detail and information about their ecological distribution is provided.