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