title: Four new species of hangingflies (Insecta, Mecoptera, Bittacidae) from the Middle Jurassic of northeastern China.
abstract: Two new species of Mongolbittacus Petrulevičius, Huang & Ren, 2007, Mongolbittacusspeciosus sp. n. and Mongolbittacusoligophlebius sp. n., and two new species of Exilibittacus Yang, Ren & Shih, 2012, Exilibittacusfoliaceus sp. n. and Exilibittacusplagioneurus sp. n., in the family Bittacidae, are described and illustrated based on five well-preserved fossil specimens. These specimens were collected from the late Middle Jurassic Jiulongshan Formation of Daohugou, Inner Mongolia, China. These new findings enhance our understanding of the morphological characters of early hangingflies and highlight the diversity of bittacids in the Mid Mesozoic ecosystems.
authors.affiliation: College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China.
authors.forename: Sulin
authors.initials: S
authors.lastname: Liu
authors.affiliation: College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China.
authors.forename: Chungkun
authors.initials: C
authors.lastname: Shih
authors.affiliation: College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Ren
keywords: Daohugou; Exilibittacus; Insect fossil; Jiulongshan Formation; Mongolbittacus