Revision of Shurabia postiretis (Reculida: Geinitziidae) from the Jurassic of Yiyang Basin, Jiangxi, china

Meixiella postiretis Huang et al., 1991, was originally described as a new genus and species assigned to the distinctive family Geinitziidae (Reculida), based on a single forewing from the Lower Jurassic Menkoushan Formation (= Shuibei Formation in the present study) in the Yiyang Basin, Jiangxi Province, east China. Meixiella postiretis was subsequently transferred to Shurabia Martynov, 1937, a taxonomic assignment with which we concur. In the present study, we provide a detailed revision of the morphological characters of Shurabia postiretis. Based on its redefined diagnostic features and a holistic analysis of Jurassic insect-bearing strata in China, we discuss the evolutionary trajectory of Shurabia. Our findings provide support for its stratigraphic positioning from the late Early Jurassic to the early Middle Jurassic.