New and little-known mute Trigonidiinae species from China (Orthoptera: Grylloidea: Trigonidiidae) Author Li, Shi-Yu 0000-0002-5218-9744 School of Life Sciences, East China Normal University, Shanghai 200241, China. & https: // orcid. org / 0000 - 0002 - 5218 - 9744 Author Liu, Yi-Jiao 0000-0002-2169-5628 School of Life Sciences, East China Normal University, Shanghai 200241, China. & https: // orcid. org / 0000 - 0002 - 2169 - 5628 Author He, Zhu-Qing Museum of Biology, School of Life Sciences, East China Normal University, Shanghai 200241, China. text Zootaxa 2022 2022-03-14 5115 2 210 220 journal article 20241 10.11646/zootaxa.5115.2.2 52679869-2b7f-4935-a253-7c200406abbd 1175-5326 6352266 7E183D4F-2E0F-42E2-BDF8-403ED2E3A523 Amusurgus ( Usgmona ) genji ( Furukawa, 1970 ) Figs. 2A , 3A , 4A , 5A , 6A , 7A Usgmona genji Furukawa 1970 Metiochodes genji Ichikawa et al . 2000 Amusurgus ( Usgmona ) genji He et al . 2010 ; He 2018 Material examined. 1 male , CHINA , Shanghai , Chenshan , 9-viii-2010 , coll. He Zhu-Qing ; 1 nymph (female), CHINA , Zhejiang Prov. , Ningbo , 12-viii-2010 , coll. Guo Jiang-Li; 1 female , CHINA , Shanghai , Chongming , 23- viii-2010 , coll. Fang Yan ; 1 male , CHINA , Shanghai , Chongming , 23-viii-2010 , coll. Guo Jiang-Li; 8 females , CHINA , Shanghai , Chongming , 23-viii-2010 , coll. Ye Shui-Song ; 3 males , CHINA , Shanghai , Dajinshandao , 16- viii-2016 , coll. He Zhu-Qing ; 3 males & 2 females , CHINA , Zhejiang Prov. , Hangzhou , 8-iv-2017 , coll. He Zhu-Qing ; 4 females , CHINA , Zhejiang Prov. , Tianmushan , 17-viii-2018 , coll. He Zhu-Qing. Measurements (in mm). Male: SZ 6.49, PR 0.92, HF 4.53; Female: SZ 6.97–7.58/12.08–12.89, PR 0.92–1.03, HF 5.42–5.93, OV 3.47–4.3. Distribution. China ( Zhejiang , Shanghai ), Japan . Remarks. Both long and short wing forms exist in this species ( Fig. 3A ). Their head, thorax and veins are similar ( Fig. 4A ), but tympana are varied. We found only female individuals in long wing form. They have inner tympana, and outer ones are very small ( Fig. 5 A-3). In short wing form, males have none tympanum on both sides ( Fig. 5 A-1); some female individuals have small inner tympana (hind wing shed individuals?), and others have none tympanum as males ( Fig. 5 A-2). Discussion of phylogenetics for this subgenus and species see remarks of Amusurgus bispinosus . Amusurgus ( Amusurgus ) fulvus Brunner von Wattenwyl, 1893 Figs. 2B , 3B , 4B , 5B , 6B , 7B Amusurgus fulvus Brunner von Wattenwyl 1893 Amusurgus ( Amusurgus ) fulvus He et al . 2010 ; He 2018 Amusurgus lateralis Chopard, 1969 ; He et al . 2010 synonym