Abstract
This study provide a new and updated checklist of the freshwater fishes of the Dasht-e Kavir basin of Iran. The list is based on historical literature records and taxon occurrence data obtained as a result of extensive field expeditions, examination of ichthyological collections and literature review. The total confirmed freshwater fish species of the Dasht-e Kavir basin comprise 22 species in 17 genera, 6 families, 4 orders and one class. The most diverse order is the Cypriniformes with 18 species (81.82%) followed by Cyprinodontiformes (2 species, 9.09%), Salmoniformes and Gasterosteiformes each with 1 species (1 species, 4.55%). The most diverse family is the Cyprinidae with 18 species (72.73%), Nemacheilidae (2 species, 9.09%) followed by Salmonidae, Cyprinodontidae, Poeciliidae and Gasterosteidae each with only one species (4.55%). New species are supposed to be discovered, the taxonomic status of some species has been changed, some are being resurrected from synonymy, and some taxonomic problems remain and are commented on briefly. Four endemic species (18.18%) in 4 genera and 2 families; and 12 exotic species (54.55%) in 10 genera and 4 families are listed here.
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