New extinct taxa of Pelecinidae sensu lato (Hymenoptera: Proctotrupoidea) in the Laiyang Formation, Shandong, China

Three new species and a new genus of pelecinid wasps from the Laiyang Formation in Laiyang, Shandong, China are described: Sinopelecinus hierus sp. nov., S. daspletis sp. nov. and Allopelecinus terpnus gen. et sp. nov. The stratigraphic correlation of insect-bearing beds in the Laiyang, Yixian and Zaza formations is reassessed; these lacustrine sedimentary rocks are likely to be contemporaneous.