The hemipteran suborder Coleorrhyncha includes only 37 extant species assigned to the family Peloridiidae. However, the suborder’s fossil record is diverse and abundant. The extinct family Progonocimicidae is very common in Middle Jurassic strata of northeastern China, especially in the Daohugou beds of Ningcheng County, Inner Mongolia, and the Haifanggou Formation in Beipiao, Liaoning Province. We re-studied the established progonocimicid species and examined 27 new specimens, indicating that the species from Daohugou are junior synonyms of those from Haifanggou. The progonocimicids from the Haifanggou Formation are assigned to two species of Cicadocoris: C. brunneus (=Mesoscytina brunnea, =Mesocimex lini) and C. sinensis (=Cicadocoris anisomeridis). Both species are common in the Daohugou beds and the Haifanggou Formation. This discovery is of significance for biostratigraphic correlation of these two lithostratigraphic units. It also contributes to our understanding of the geological age of the famous Daohugou biota, which has yielded the earliest known feathered dinosaurs and diverse early mammals.
Jia-Qian Jiang [jiaqianjiang@126.