New fossil records of bizarre Ferganolyda (Hymenoptera: Xyelydidae) from the Middle Jurassic of China

Wang, M., Rasnitsyn, P.A., Shih, C.K. & Ren, D., 2015. New fossil records of bizarre Ferganolyda (Xyelydidae: Hymenoptera) from the Middle Jurassic of China. Alcheringa 39, xxx-xxx. ISSN 0311-5518 Two new species of Ferganolyda Rasnitsyn, 1983, F. eucalla and F. insolita, are described. Also, F. scylla Rasnitsyn, Zhang & Wang, 2006 and F. chungkuei Rasnitsyn, Zhang & Wang, 2006 are re-described based on new materials in this study. All of these well-preserved specimens were collected from the latest Middle Jurassic Jiulongshan Formation of Daohugou Village in Inner Mongolia, China. Based on the new morphological data,a key to the eight species of Ferganolyda is provided. This genus has significant sexual dimorphism,and the new materials show that males have head capsules with ratios of width to length ranging from 3.1 to 3.6, whereas females have ratios from 1.9 to 2.1. These new findings enhance our understanding of the evolution and relationships of the extinct Xyelydidae (Hymenoptera). Mei Wang [wangmeicnu@163.com], Chungkun Shih [chungkun.shih@gmail.com] and Dong Ren [rendong@mail.cnu.edu.cn], Key Lab of Insect Evolution & Environmental Changes, College of Life Sciences, Capital Normal University, Xisanhuanbeilu 105, Haidian District, Beijing 100048, PR China; Alexandr P. Rasnitsyn [alex.rasnitsyn@gmail.com], Paleontological Institute, Russian Academy of Sciences, Moscow 117997, Russia, and Invertebrate Paleontology Department, Natural History Museum, Cromwell Road, London SW7 5BD, UK.