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Paraschistura Prokofiev, 2009 is a newly described genus based on osteological characters, but detailed information for all species of the genus is not available. To describe osteological characteristics of the endemic species of Paraschistura nielseni, twelve specimens were collected from the Shapur River of Persis basin which drains to the Persian Gulf and their osteological characteristics were examined. According to the results, P. nielseni is characterised by bearing a square-shaped prevomer, four basibranchials, a semi-ossified sesamoid, a non-alveolar bony swim bladder capsule, and separated pelvic bone bases. Based on these features, P. nielseni could be distinguished from other loaches species.


Osteology Fish skeleton Neurocranium Loach Persis basin.

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AZIMI, H., MOUSAVI-SABET, H., & EAGDERI, S. (2015). Osteological characteristics of Paraschistura nielseni (Cypriniformes, Nemacheilidae). Iranian Journal of Ichthyology, 2(3), 155–164.


    Bănărescu, P.M. & Nalbant, T. 1995. A generical classification of Nemacheilinae with description of two new genera (Teleostei: Cypriniformes: Cobitidae). Travaux Du Museum d'Histoire Naturelle Grigore Antipa 35: 429-496.
    Coad, W.B. 2015. Fresh water fishes of Iran. Retrieved from Accessed on 11 May 2015.
    Eschmeyer, W.N. & Fong, J.D. 2011. Animal biodiversity, an outline of higher-level classification and survey of taxonomic richness. Zootaxa 23: 26-38.
    Freyhof, J.; Sayyadzadeh, G.; Esmaeili, H.R. & Geiger M. 2015. Review of the genus Paraschistura from Iran with description of six new species (Teleostei: Nemacheilidae). Ichthyological Exploration Freshwaters 26(1): 1-48.
    Jalili, P. & Eagderi, S. 2015. Cephalic osteology of Sefidrud stone loach Oxynoemacheilus bergianus. Journal of Animal Researches 28(1): (In press; In Farsi).
    Nalbant, T.T. & Bianco, P.G. 1998. The loaches of Iran and adjacent region with description of six new species (Cobitoidea). Italian Journal of Zoology 65: 109-123.
    McClelland, J. 1838. Observations on six new species of Cyprinidae, with an outline of a new classification of the family. Journal of the Asiatic Society of Bengal 7: 941-948
    Mafakheri, P.; Eagderi, S.; Farahmand, H. & Mousavi-Sabet, H. 2014. Osteological structure of Kiabi loach, Oxynoemacheilus kiabii (Actinopterygii: Nemacheilidae). Iranian Journal of Ichthyology 1(3): 197-205.
    Mafakhei, P.; Eagderi, S.; Farahmand, H. & Mosavii-Sabet, H. 2015. Descriptive osteology of Oxynoemacheilus kermanshahensis (Bănărescu and Nalbant, 1966) (Cypriniformes, Nemacheilidae). Croatian Journal of Fisheries 73: 115-123.
    Nelson, J.S. 2006. Fishes of the world. John Wiley and Sons Inc. New York.
    Prokofiev, A.M. 2004. Osteology and Relationships between Loaches of the Genus Dzihunia (Osteichthyes, Balitoridae). Zoologicheskij Zhurnal 83: 826-838.
    Prokofiev, A.M. 2009. Problems of the classification and phylogeny of Nemacheiline loaches of the group lacking the preethmoid I (Cypriniformes: Balitoridae: Nemacheilinae). Journal of Ichthyology 49: 874-898.
    Prokofiev, A.M. 2010. Morphological classification of loaches (Nemacheilinae). Journal of Ichthyology 50: 827-913.
    Sawada, Y. 1982. Phylogeny and zoogeography of the superfamily Cobitoidea (Cyprinoidei, Cypriniformes). Memoirs of the Faculty of Fisheries of Hokkaido University 28: 65-223.
    Regan, C.T. 1911. The Classification of Teleostean Fishes of the Order Ostariophysi. I. Cyprinoidea. The Annals and Magazine of Natural History 8: 13-32.
    Taylor, W.R. & Van Dyke, G.C. 1985. Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage study. Cybium 9: 107-119.
    Vatandoust, S. & Eagderi, S. 2015. Paraschistura ilamensis, a new species of loach from the Tigris River drainage (Teleostei: Nemacheilidae). International Journal of Aquatic Biology 3 (3): 177-182.