Chondrostoma
Chondrostoma 'lump' + wikt:στόμα 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.
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.
Species
These are the currently recognized species in this genus:Chondrostoma angorense Elvira, 1987 Chondrostoma beysehirense Bogutskaya, 1997 Chondrostoma ceyhanense Küçük, Turan, Güçlü, Mutlu & Çiftci, 2017Chondrostoma colchicum Derjugin, 1899 Chondrostoma cyri Kessler, 1877 Chondrostoma esmaeilii Eagderi, Jouladeh-Roudbar, Birecikligil, Çiçek & Coad 2017Chondrostoma holmwoodii Chondrostoma kinzelbachi Krupp, 1985 Chondrostoma knerii Heckel, 1843 Chondrostoma kubanicum Berg, 1914 Chondrostoma meandrense Elvira, 1987 Chondrostoma nasus Chondrostoma ohridanum Karaman, 1924Chondrostoma orientale Bianco & Bănărescu, 1982 Chondrostoma oxyrhynchum Kessler, 1877 Chondrostoma phoxinus Heckel, 1843 Chondrostoma prespense Karaman, 1924 Chondrostoma regium Chondrostoma scodrense Elvira, 1987 Chondrostoma smyrnae Küçük, Çiftçi, Güçlü & Turan, 2021Chondrostoma soetta Bonaparte, 1840 Chondrostoma toros Küçük, Turan, Güçlü, Mutlu & Çiftci, 2017Chondrostoma turnai Güçlü, Küçük, Turan, Çiftçi & Mutlu, 2018Chondrostoma vardarense Karaman, 1928 Chondrostoma variabile Yakovlev, 1870