Freyhof Jörg, Geiger Matthias
Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 310, 12587 Berlin, Germany..
Zootaxa. 2017 Jun 2;4273(2):258-270. doi: 10.11646/zootaxa.4273.2.6.
Oxynoemacheilus zarzianus, new species, is described from the Lesser Zab River drainage, a tributary of the lower Tigris. It is distinguished from other Oxynoemacheilus species in the Tigris drainage by having a slightly emarginate caudal fin, no suborbital groove in males, a complete lateral line, the posterior process of the bony air-bladder capsule directed posteriorly, the flank and posterior part of back covered by scales, short barbels and a deep caudal peduncle. It is the fourth Oxynoemacheilus species known from the Lesser Zab drainage, where such loaches seem to be highly isolated in headwaters. Oxynoemacheilus species diversity in the Euphrates and Tigris drainage is exceptional high. Today 22 species are known from the entire Euphrates and Tigris drainage and 15 from the Tigris drainage alone.
扎尔齐安高原鳅，新物种，采自底格里斯河下游支流小扎卜河流域。它与底格里斯河流域的其他高原鳅属物种的区别在于：尾鳍略凹入，雄性无眶下沟，侧线完整，骨质鳔囊后突向后，体侧和背部后部被鳞，须短，尾柄深。它是小扎卜河流域已知的第四种高原鳅属物种，该流域的此类鳅科鱼类似乎在源头高度隔离。幼发拉底河和底格里斯河流域的高原鳅属物种多样性异常高。如今，整个幼发拉底河和底格里斯河流域已知有22个物种，仅底格里斯河流域就有15个物种。
