The crested loaches of the genus Paracobitis from the Sistan basin (Iran) are reviewed based on morphological and mitochondrial cytb and COI sequences characters to check the status of taxa in phylogenetic trees. Paracobitis rhadinaea (Regan, 1906) and P. vignai Nalbant & Bianco, 1998 were known only based on minor morphological differences (presence or absence of scales, caudal fin shape, colour pattern and fish size). We failed to find any diagnostic molecular and morphological characters between them. Therefore, we regard P. vignai as a junior synonym of P. rhadinaea.

中文翻译：

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伊朗泥鳅 Paracobitis vignai 和 P. rhadinaea (Teleostei: Nemacheilidae) 的分类地位

基于形态学和线粒体细胞色素蛋白和COI序列特征对来自锡斯坦盆地（伊朗）的Paracobitis属的凤头泥鳅进行了审查，以检查系统发育树中分类群的状态。Paracobitis rhadinaea (Regan, 1906) 和 P. vignai Nalbant & Bianco, 1998 仅基于微小的形态差异（有无鳞片、尾鳍形状、颜色图案和鱼大小）而为人所知。我们未能在它们之间找到任何诊断分子和形态特征。因此，我们将 P. vignai 视为 P. rhadinaea 的低级同义词。