Freyhof Jörg, Kaya Cüneyt, Epitashvili Giorgi, Geiger Matthias F
Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, 10115 Berlin, Germany..
Zootaxa. 2021 Apr 8;4952(1):zootaxa.4952.1.8. doi: 10.11646/zootaxa.4952.1.8.
Oxynoemacheilus phasicus, new species, is described from the Rioni and Enguri River drainages in Georgia. It is distinguished from other Oxynoemacheilus species in the O. brandtii group by a mottled or marbled flank pattern in adults, a slightly emarginate caudal fin, and a deep caudal peduncle. Molecular data suggest that the new species is characterized by a minimum K2P distance of 7.5% from O. brandtii from the Kura drainage in the mtDNA COI barcode region. Oxynoemacheilus brandtii and O. elsae are re-diagnosed. A very slender Oxynoemacheilus from the Aras drainage clusters as sister to O. elsae in our molecular analysis and not with O. brandtii from the Kura River. However, it is identified as O. brandtii as it is indistinguishable from this species in morphological characters.
新物种阶段性欧诺鳅（Oxynoemacheilus phasicus）是根据格鲁吉亚里奥尼河和英古里河流域的样本描述的。它与布氏欧诺鳅（O. brandtii）种群中的其他欧诺鳅物种的区别在于，成鱼体侧有斑驳或大理石花纹，尾鳍略凹，尾柄深。分子数据表明，在mtDNA COI条形码区域，该新物种与库拉河流域的布氏欧诺鳅的最小K2P距离为7.5%。重新诊断了布氏欧诺鳅和埃尔莎欧诺鳅（O. elsae）。在我们的分子分析中，来自阿拉斯河流域的一种非常细长的欧诺鳅聚为埃尔莎欧诺鳅的姐妹群，而非与库拉河的布氏欧诺鳅聚在一起。然而，由于其形态特征与该物种无法区分，故被鉴定为布氏欧诺鳅。
