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[[ Chondrostoma Agassiz ]]

The genus Chondrostoma s.l. is composed of small to medium-sized cyprinid fishes distributed in the northern Mediterranean drainages across Europe, western Asia and the Middle East (Mathias 1921; Elvira 1987, 1991, 1997). The genus is particularly diversified in the Iberian Peninsula, where over one-third of the known species is found. Its members can be split into seven species groups defined from molecular phylogenies (Doadrio & Carmona 2004) and include Iberian bladeless species (i.e., species that do not have a horny blade on the lower lip) that had been sometimes included in the genus Rutilus ZBK (Coelho et al. 1997; Zardoya & Doadrio 1998). Recently, based on congruence between molecular and morphological characters, Robalo et al. (2007) proposed Chondrostoma be restricted to the nasus- and soetta-species groups , while the arcasii- , genei- , lemmingii- , polylepis- and toxostoma-species groups be elevated to the generic level.

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