Checklists of all described organisms from the Daohugou biota, and insects from the Haifanggou Formation at Haifeng Village (Beipiao City, Liaoning Province) and the ‘Jiulongshan Formation’ at Zhouyingzi Village (Luanping County, Chengde City, Hebei Province), are provided. Fossil insects from the Daohugou biota are summarized, including a total of 760 valid species reported in 396 research papers from 2001 to April, 2021. The heyday of exploration of Daohugou insects has been lasted for a decade from 2006 to 2016 according to the number of published papers.

Sinonothochrysa zhangi Huang and Nel gen. et sp. nov., a new genus and species of nothochrysine lacewing, are described and illustrated from the Palaeocene Buxin Formation, Sanshui Basina, Foshan City, Guangdong Province, South China. The new taxon is the oldest described representative and first reports this subfamily in China. It is also the first formally described fossil insects from the Buxin Formation of the Sanshui Basin.

Mecoptera was in great abundance in the Permian, but little is known from China. A new family, Sinoagetopanorpidae fam. nov., is described and illustrated from the upper Guadalupian Yinping Formation at Yinping Mountain, Chaohu City, Anhui Province, China. Sinoagetopaorpa permiana Lin, Nel and Huang, 2010 was previously attributed to Permochoristidae and now is revised as the type species of Sinoagetopanorpidae fam. nov. Three genera (two new genera) and ten new species of this new family are described and illustrated: Sinoagetopanorpa permiana Lin, Nel and Huang, 2010, S. nigra sp. nov., S. rotunda sp. nov., S. lini sp. nov., S. minuta sp. nov., S. elegans sp. nov., S. grimaldii sp. nov., S. magna sp. nov., Raragetopanorpa zhangi gen. et sp. nov., Permoagetopanorpa yinpingensis gen. et sp. nov. and P. incompleta sp. nov. Some isolated hind wings are described and illustrated, although it is difficult to assign them to any particular species. As a dominant mecopteran lineage in the Yinping Formation, Sinoagetopanorpidae represents an endemic group that might have independently evolved on the Yangtze Platform.

Mesopsyche Tillyard, 1917 is an extinct genus of Mecoptera belonging to the long-proboscid-bearing Mesopsychidae, an adaptation probably associated with pollination of Mesozoic gymnosperms. Here, we describe two new species, Mesopsyche jinsuoguanensis sp. nov., from the Middle Triassic Tongchuan Formation in Shaanxi Province, and Mesopsyche liaoi sp. nov., from the Upper Triassic Huangshanjie Formation in the Xinjiang Uygur Autonomous Region of China. The new discoveries highlight the diversity of the Mesopsyche in the region during the Mesozoic.

Permochoristidae is one of the most diverse mecopteran families in the fossil record, but only a few species have been previously described from China. Herein, we describe and illustrate two new permochoristid species, Mesochorista tongchuanensis sp. nov. and Agetopanorpa sinica sp. nov., from the late Middle Triassic of Yanchang Formation in Shaanxi Province. Mesochorista conjunctiva comb. n. is proposed for Qingochorista conjunctiva. Mesochorista tongchuanensis sp. nov. and Agetopanorpa sinica sp. nov. represent the sparse record of Mesochorista and Agetopanorpa in China, respectively. The new discovery adds to our knowledge of their distribution and palaeodiversity during the Triassic. urn:lsid:zoobank.org:pub:DA7ACCFF-D76E-492D-BB1B-37AC1CA5D264

The scorpionfly genus Longiphlebia, with a sole species, is confined to the Middle-Late Jurassic Daohugou biota. Herein, we describe and figure the second species, Longiphlebia incompleta sp. nov., based on one specimen collected from the Upper Jurassic Tiaojishan Formation at Zhuanshanzi, near Nanshimen Village, Gangou Township, Qinglong County, Qinhuangdao City, Hebei Province. It is a new representative insect belonging to the late assemblage of Yanliao biota. Our discovery indicates new evolutionary evidence between the early and late assemblages of the Yanliao biota.