A new species of Leptephialtites Rasnitsyn, 1975 (Insecta: Hymenoptera: Ephialtitidae) from the Jurassic Daohugou beds of NE China
Leptephialtites Rasnitsyn, 1975 is a diverse wasp genus of the subfamily Ephialtitinae (Ephialtitidae) in the Late Jurassic Karatau Biota from Karatau, southern Kazakhstan. It was also reported from the Middle-Late Jurassic Daohugou Biota in Ningcheng, Northeast China but with no descriptions and figures provided. Herein, a new species, Leptephialtites zhangi Ding and Zhang, sp. nov., is established based on a female wasp specimen from the Middle-Upper Jurassic Daohugou beds near Daohugou Village, Wuhua Town, Ningcheng County, Chifeng City, Inner Mongolia, China. The new species shows some differences from the Karatau species in having a forewing with 1-Rs about half length of its distance to the pterostigma (vs. at most as long as its distance to the pterostigma) and complete 1r-rs (vs. rudimentary or completely absent), and a spindle-like metasoma that is widest at the middle (vs. widest in the rear half). Furthermore, a key to the species of Leptephialtites is provided. Occurrences of the genus Leptephialtites in both the Karatau and Daohugou biotas confirm the close relationship between the two biotas.