Taxonomy of the genus Duolandrevus Kirby, 1906 (Orthoptera: Gryllidae; Landrevinae) from China with a new species of the subgenus Eulandrevus Gorochov, 1988 Author Zheng, Yanna Author Ma, Libin College of Life Sciences, Shaanxi Normal University, Xi’an, China, 710119 text Zootaxa 2021 2021-03-12 4942 2 252 268 journal article 7589 10.11646/zootaxa.4942.2.7 6bedee85-2f44-4799-a7fe-d5ad1e141575 1175-5326 4600564 4B0F7A80-97E8-4C32-8228-0CA2B63F1601 Key to species of Duolandrevus from China (based on adult males) 1. Hind wings rather short, reaching or not exceeding posterior margin of metanotal gland; ectoparameres narrowed............................................................................. Subgenus Eulandrevus Gorochov, 1988 ................................................................................................... 2 - Hind wings slightly shorter, conspicuously exceeding posterior margin of metanotal gland*; ectoparameres widened (about 4/5 of the length)........................................................... Subgenus Doulandrevus Kriby, 1996 ................................................................. D . ( D .) bannanus Zhang, Liu & Shi, 2017 2. Mirror present, without chamber in it; middle lobes of epiphallus long..................................................................................................... D . ( E .) unguiculatus Ma, Gorochov & Zhang, 2015 - Mirror absent, possessing many cells in mirror; middle lobes of epiphallus short................................... 3 3. Tegmina long, reaching the 8 th abdominal segment........................................................... 8 ................................................................. D . ( E .) ziyunensis Zhang, Liu & Shi, 2017 - Tegmina short, away from the 8 th abdominal segment......................................................... 4 4. Lateral lobes of epiphallus without branches................................................................ 5 - Lateral lobes of epiphallus branched...................................................................... 7 5. Head wider than pronotum; tip of epiphallus depressed in ventral view.................................................................................................................... D . ( E .) infuscatus Liu & Bi, 2010 - Head almost as wide as pronotum; tip of epiphallus not depressed in ventral view.................................. 6 6. Lateral lobe of epiphallus apically acute in dorsal view...................... D . ( E .) hainanensis Liu, He & Ma, 2015 - Lateral lobe of epiphallus apically obtuse and hirsute in dorsal view........... D . ( E .) gorochovi Zhang, Liu & Shi, 2017 7. Included angle of branches almost forming a flat angle......................... D . ( E .) axinus Zhang, Liu & Shi, 2017 - Included angle of branches almost forming a right angle...................................................... 8 Included angle of branches almost forming an acute angle...................... D . ( E .) dendrophilus ( Gorochov, 1988 ) 8. Posterior lateroabdominal projection of epiphallus long, apically reaching epiphallic lateral lobe branches............................................................................................. D . ( E .) obsidianus He, 2019 - Posterior lateroabdominal projection of epiphallus short, apex not reaching upper branch of lateral lobe of epiphallus...................................................................................... D . ( E .) longlouensis sp. n.