Taxonomy of the Panorpa issikiana species group, with descriptions of twenty new species (Mecoptera: Panorpidae) Author Wang, Ji-Shen College of Agriculture and Biological Science, Dali University, Dali, Yunnan 671003, P. R. China; e-mail: wangjishen 826 @ gmail. com & Cangshan Forest Ecosystem Observation and Research Station of Yunnan Province, Dali University, Dali, Yunnan 671003, P. R. China & Corresponding author Author Zhao, Can-Jun Biodiversity Conservation and Breeding Center (Dali) of Northwestern Yunnan, Bureau of the Cangshan-Erhai National Nature Reserve, Dali, Yunnan 671000, P. R. China; e-mail: 180389099 @ qq. com text Acta Entomologica Musei Nationalis Pragae 2024 2024-06-15 64 1 79 106 http://dx.doi.org/10.37520/aemnp.2024.007 journal article 10.37520/aemnp.2024.007 1804-6487 12519728 B87622D2-95FB-4692-A76E-ABC00EF184B1 Panorpa dalangba Wang sp. nov. ( Figs 15–24 ) Type material. HOLOTYPE : J ( CN23 Piskdlb001), CHINA : YUNNAN : Dali Bai Autonomous Prefecture , Yunlong County , Shuchang Village , Dalangba , 25°51′08″N , 99°15′09″E , 2560 m , 3.vi.2022 , leg. Liang-Jie Jia , Jia-Ling Li , Jiao Xie , Chun-Mei Liao & Ji-Shen Wang ( DALU ) . PARATYPES : 15 JJ 20 ♀♀ ( CN 23Piskdlb002–036), same data except 3–5.vi.2023 ( DALU ). Diagnosis. This new species can be differentiated from the other members of this group by the combination of the following characters: in males, 1) basal lobe of gonostyli greatly enlarged with apex slightly bifurcated and hook-like basal process caudo-basally ( Fig. 18 ); 2) dorsal processes of aedeagus each with three acute processes apically, and greatly humped in middle ( Figs 21, 22 ); in females, 3) laterotergites IX broader than apical prominence of subgenital plate with basal half membranous and distal half sclerotized ( Fig. 23 ); and 4) medigynium with main plate broad oval, posterior arms slender and slightly shorter than main plate, and apodemes slightly extending beyond main plate ( Fig. 24 ). Measurements (mm). Male (n = 16): AtL 10.0–10.8, AbL 10.8–11.0, BdL 14.0–15.5, FL 12.6–13.2, FW 3.0–3.2, HL 11.2–12.0, HW 2.9–3.0. Female (n = 20): AtL 10.8–11.5, AbL 7.5–8.0, BdL 10.6–11.0, FL 13.0–13.8, FW 3.0–3.2, HL 12.0–12.6, HW 2.9–3.0. Etymology. Named after the type locality, Dalangba. Noun in apposition. Distribution. China : Yunnan : Yunlong ( Fig. 212 ).