New Fossil Lepidoptera (Insecta: Amphiesmenoptera) from the Middle Jurassic Jiulongshan Formation of Northeastern China
(A), A hypothetical forewing of the Lepidoptera modified after Kristensen & Skalski ; red line indicates that M1, after separation from M2, subtends an angle greater than 60 degrees and is sharply angulate at the junction with the r–m crossvein. (B), A hypothetical forewing of the Trichoptera modified after Holzenthal et al. ; red line indicates the separation of M1+2, and M1 consisting of smooth and sublinear veins. Abbreviation: ny, nygmata.