Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, 10115 Berlin, Germany..
Zootaxa. 2021 Apr 21;4964(1):zootaxa.4964.1.6. doi: 10.11646/zootaxa.4964.1.6.
Oxynoemacheilus sarus, new species, is described from the lower Ceyhan and Seyhan drainages in southern Anatolia. It is distinguished from other Oxynoemacheilus species in Cilicia (including the Göksu, Seyhan and Ceyhan drainages) by possession of a series of irregularly shaped midlateral blotches, 3-5 dark-brown bands on the caudal fin, a complete lateral line, a forked caudal fin (shortest middle caudal-fin ray is 56-70% of longest ray of the upper caudal-fin lobe), the caudal peduncle depth 1.4-1.8 times in its length, and a suborbital groove in male individuals. The new species occurs in sympatry with superficially similar O. seyhanicola and O. evreni, and is distinguished by colour pattern as well as morphometric and molecular characters. Molecular data suggest that the closest relatives to the new species in our dataset are O. euphraticus and O. shehabi, which is characterised by a minimum K2P distance of 3.6% and 3.8%, respectively, in the COI mtDNA barcode region.
新种沙氏副鳅描述于安纳托利亚南部的下塞伊汉和塞伊汉水系。它与奇利奇（包括高苏、塞伊汉和塞伊汉水系）的其他 Oxynoemacheilus 物种不同，具有一系列不规则形状的侧斑、尾鳍上的 3-5 条深褐色带、完整的侧线、分叉的尾鳍（最短的中间尾鳍射线为上尾鳍叶最长射线的 56-70%）、尾柄深度为其长度的 1.4-1.8 倍，以及雄性个体的眶下沟。该新种与表面相似的 O. seyhanicola 和 O. evreni 同域分布，并通过颜色图案以及形态和分子特征来区分。分子数据表明，在我们的数据集内与新种最接近的亲缘种是 O. euphraticus 和 O. shehabi，其 COI mtDNA 条码区的最小 K2P 距离分别为 3.6%和 3.8%。
