New mesosciophilid gnats (Insecta: Diptera: Mesosciophilidae) in the Daohugou biota of Inner Mongolia, China

Two extinct new species referable, respectively, to the genus Mesosciophila Rohdendorf, 1946 and a new genus, Paramesosciophilodes, within the Mesosciophilidae are described from the Daohugou Formation in Chifeng, Inner Mongolia, China: Mesosciophila eucalla sp. nov. and Paramesosciophilodes ningchengensis gen. et sp. nov. The diagnosis of Mesosciophila is supplemented based on information from the new species. The familial placements of four Chinese species are reassessed: Sinosciophila meileyingziensis Hong, Liaoxifungivora simplicis Hong, Atalosciophila yanensis Ren, Lu, Guo and Ji, and Huaxiasciophilites jingxiensis Zhang, Hong and Li.