biostudies-literatureUnknown1108Cao YTwo new species of <i>Itaphlebia</i> Sukatsheva, 1985, <i>I.procera</i> <b>sp. nov.</b> and <i>I.elegana</i> <b>sp. nov.</b>, are described and illustrated from the latest Middle Jurassic Jiulongshan Formation of Daohugou, Inner Mongolia, China. Based on fossil specimens with wings, these new species are established and assigned to <i>Itaphlebia</i> by a combination of three forewing characters: Sc with three branches ending at C, the four-branched Rs (R₂ to R₅) originating distad of M (vs. three-branched RS (R₂₊₃ undivided) in all other fossil and extant nannochoristids), and M forking with four branches; and a hind wing character of Sc simple and short, terminating at C well before the pterostigma. Furthermore, this is the first report of long and robust setae present on the anal veins of the forewing for <i>I.elegana</i> <b>sp. nov.</b> in fossil Nannochoristidae.ZooKeys175-188https://www.ebi.ac.uk/biostudies/studies/S-EPMC9848664biostudies-literatureTwo new species of <i>Itaphlebia</i> (Insecta, Mecoptera, Nannochoristidae) from the late Middle Jurassic of China.PMC9848664Cao YLin XShih CRen DfalseTwo new species of <i>Itaphlebia</i> (Insecta, Mecoptera, Nannochoristidae) from the late Middle Jurassic of China.Two new species of <i>Itaphlebia</i> Sukatsheva, 1985, <i>I.procera</i> <b>sp. nov.</b> and <i>I.elegana</i> <b>sp. nov.</b>, are described and illustrated from the latest Middle Jurassic Jiulongshan Formation of Daohugou, Inner Mongolia, China. Based on fossil specimens with wings, these new species are established and assigned to <i>Itaphlebia</i> by a combination of three forewing characters: Sc with three branches ending at C, the four-branched Rs (R₂ to R₅) originating distad of M (vs. three-branched RS (R₂₊₃ undivided) in all other fossil and extant nannochoristids), and M forking with four branches; and a hind wing character of Sc simple and short, terminating at C well before the pterostigma. Furthermore, this is the first report of long and robust setae present on the anal veins of the forewing for <i>I.elegana</i> <b>sp. nov.</b> in fossil Nannochoristidae.2022-01-01T00:00:00Z20222025-04-18T21:17:32.198Z2025-04-07T09:15:43.722ZS-EPMC98486643676069610.3897/zookeys.1108.85378