Progonocimicids (Hemiptera, Coleorrhyncha) from the Middle Jurassic Haifanggou Formation, western Liaoning, northeast China support stratigraphic correlation with the Daohugou beds

Jiang, J.-Q., Cai, C.-Y. & Huang, D.-Y., October 2015. Progonocimicids from the Middle Jurassic Haifanggou Formation, western Liaoning, northeast China support stratigraphic correlation with the Daohugou beds. Alcheringa 40, XXX–XXX. ISSN 0311-5518.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 spec...