Diversity and the Origin of Perlodinella Klapálek 1912 (Plecoptera: Perlodidae) in Qinghai Province, China

The article presents integrative research of the perlodid genus <i>Perlodinella</i> in Qinghai Province, northwestern China. <i>P. tatunga</i> Wu, 1973 is considered a junior synonym of <i>P. kozlovi</i> Klapálek, 1912, with a further description of intraspecific morphological variability, while <i>P. unimacula</i> Klapálek, 1912 is considered to be nomen dubium. The COI barcodes of the three valid species in Qinghai, <i>P. epiproctalis</i> (Zwick, 1997), <i>P. kozlovi</i> Klapálek, 1912, and <i>P. microlobata</i> Wu, 1938 are firstly sequenced, enabling adult-larva matching and the analysis of genetic diversity. The larval morphology of <i>P. kozlovi</i> and <i>P. microlobata</i> is described for the first time. Additionally, the biology, ecological adaptability, and fungal infections of <i>Perlodinella</i> are firstly recorded with an environment-related comparison. The discussion of the origin and immigration of the genus is also provided.