New fossil species of Ephialtitidae and Baissidae (Hymenoptera, Apocrita) from the mid-Mesozoic of northeastern China

Abstract

Li, L., Shih, C.K., Li, D. & Ren, D. 12 June 2019. New fossil species of Ephialtitidae and Baissidae (Hymenoptera, Apocrita) from the mid-Mesozoic of northeastern China. Alcheringa XX, X–X. ISSN 0311-5518.One new species of Ephialtitidae—Stephanogaster integra sp. nov.—from the uppermost Middle Jurassic Jiulongshan Formation at Daohugou Village, Inner Mongolia, China, and four new species of Baissidae—Manlaya proba sp. nov., Manlaya magna sp. nov., Manlaya ultima sp. nov. and Mesepipolaea parva sp. nov.—from the Lower Cretaceous Yixian Formation at Huangbanjigou Village, Liaoning, China, are described and illustrated. In addition, all described fossils of the genera Manlaya Rasnitsyn, 1980b and Stephanogaster Rasnitsyn, 1975 are listed with their distributions, geological ages, and key forewing characters. This list allows the comparison of interspecific venational differences within the two genera, which in turn highlights high levels of species-level diversity among both the Cretaceous species of Manlaya and Jurassic species of Stephanogaster.Longfeng Li* [fenger4499@163.com], Institute of Vertebrate Paleontology, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070, Gansu Province, PR China; Chungkun Shih [chungkun.shih@gmail.com], College of Life Sciences, Capital Normal University, Beijing 100048, PR China; Daqing Li [daqingli@gsau.edu.cn], Institute of Vertebrate Paleontology, College of Life Science and Technology, Gansu Agricultural University, Lanzhou City, 730070, Gansu Province, PR China; Dong Ren [rendong@mail.cnu.edu.cn], College of Life Sciences, Capital Normal University, Beijing 100048, PR China.