Abstract
Abstract In this study, a revised checklist of macroalgae of Iran with an updated nomenclature and taxonomy has been compiled based on published records. Using currently accepted names, 309 species and infraspecific taxa of macroalgae have been identified to date, including 78 Chlorophyta (within 15 families), 70 Ochrophyta (Phaeophyceae; within 7 families) and 161 Rhodophyta (within 30 families). The brown alga Sargassum with 25 taxa was the most diverse genus, and the Rhodomelaceae (Rhodophyta) with 36 taxa was the most species-rich family. The Cheney ratio of 3.4 and the species composition of brown seaweeds suggest that the Iranian marine algal flora is warm-temperate. Sørensen similarity indices were used to compare the marine algal flora of Iran with that of Saudi Arabia within the Persian Gulf and the Sultanate of Oman within the Gulf of Oman. The algal diversity of the Iranian coast within the Gulf of Oman is less than that within the Persian Gulf, and this difference is attributed to undercollecting. Given that this is the first inclusive checklist of macroalgae of Iran, covering the coast lying within the Persian Gulf and the Gulf of Oman, it could serve as a foundation for future phycological and biogeographical studies of the taxa in the country and the region.
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