Chondrostoma (from the Ancient Greek roots (khondros) 'lump' + (stoma) 'mouth' = 'lump-mouth') is a genus of ray-finned fish in the family Leuciscidae. They are commonly known as nases, although this term is also used locally to denote particular species, most frequently the common nase (C. nasus). The common name refers to the protruding upper jaw of these fishes; it is derived from the German term Nase 'nose'.
Several species have a very restricted range. Some of these endemics are very rare nowadays, and at least one species is globally extinct.
Systematics In 2007 it was determined that the presumed monophyletic group consisted of six at least partly independent lineages of Leuciscinae, meaning that the rasping feeding apparatus evolved more than once. It was proposed to split the genus in six in consequence: Achondrostoma, Chondrostoma, Iberochondrostoma, Pseudochondrostoma, Protochondrostoma and Parachondrostoma. But at least Achondrostoma and Iberochondrostoma may not be separable.Gante et al. (2007), Robalo et al. (2008)
Species These are the currently recognized species in this genus: Chondrostoma angorense Elvira, 1987 (Ankara nase) Chondrostoma beysehirense Bogutskaya, 1997 (Beysehir nase) Chondrostoma ceyhanense Küçük, Turan, Güçlü, Mutlu & Çiftci, 2017 Chondrostoma colchicum Derjugin, 1899 (Colchic nase) Chondrostoma cyri Kessler, 1877 (Kura nase) Chondrostoma esmaeilii Eagderi, Jouladeh-Roudbar, Birecikligil, Çiçek & Coad 2017 Chondrostoma holmwoodii (Boulenger 1896) (Izmir nase) Chondrostoma kinzelbachi Krupp, 1985 (Orontes nase) Chondrostoma knerii Heckel, 1843 (Neretvan nase) Chondrostoma kubanicum Berg, 1914 (Kuban nase) Chondrostoma meandrense Elvira, 1987 (Menderes nase) Chondrostoma nasus (Linnaeus, 1758) (Common nase) Chondrostoma ohridanum Karaman, 1924 Chondrostoma orientale Bianco & Bănărescu, 1982 (Iranian nase) Chondrostoma oxyrhynchum Kessler, 1877 (Terek nase) Chondrostoma phoxinus Heckel, 1843 (Minnow nase) Chondrostoma prespense Karaman, 1924 (Prespa nase) Chondrostoma regium (Heckel, 1843) (Mesopotamian nase) Chondrostoma scodrense Elvira, 1987 (Skadar nase) Chondrostoma smyrnae Küçük, Çiftçi, Güçlü & Turan, 2021 Chondrostoma soetta Bonaparte, 1840 (Italian nase) Chondrostoma toros Küçük, Turan, Güçlü, Mutlu & Çiftci, 2017 Chondrostoma turnai Güçlü, Küçük, Turan, Çiftçi & Mutlu, 2018 Chondrostoma vardarense Karaman, 1928 (Vardar nase) Chondrostoma variabile Yakovlev, 1870 (Volga undermouth)
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