Taxonomic revision of Phaesticus Uvarov and synonymy with Flatocerus Liang & Zheng syn. nov. (Orthoptera: Tetrigidae) Author Zha, Ling-Sheng School of Life Sciences, Huaibei Normal University, Huaibei 235000, P. R. China Author Skejo, Josip University of Zagreb, Faculty of Science, Department of Biology, Division of Zoology, Evolution Lab, Rooseveltov trg 6, HR- 10000 Zagreb, Croatia Author Mao, Ben-Yong College of Agriculture and Biology Science, Dali University, Dali 671003, P. R. China Author Ding, Jian-Hua 0000-0002-0348-9847 School of Life Sciences, Huaibei Normal University, Huaibei 235000, P. R. China 59823039@qq.com text Zootaxa 2021 2021-04-29 4965 3 501 514 journal article 6996 10.11646/zootaxa.4965.3.5 5be7d82f-c25e-4d85-9345-e1b170b58b31 1175-5326 4754258 145FAB27-536E-4E7E-A435-79816D728E32 Phaesticus moniliantennatus ( Günther, 1940 ) Fig. 4 ( Phaestus moniliantennatus Günther, 1940 ; Lamprauges moniliantennatus ( Günther, 1940 )) = Flatocerus nankunshanensis Liang & Zheng, 1984 syn. nov. = Flatocerus wuyishanensis Zheng, 1991 syn. nov. = Flatocerus chishuiensis Zheng & Shi, 2006 = Flatocerus nigritibialis Zheng, Bai & Xu, 2011a = Flatocerus nigrifemura Zheng, Zhang & Zeng, 2011b = Flatocerus guizhouensis Wang, 1992 syn. nov. = Flatocerus daqingshanensis Zheng & Jiang, 1998 syn. nov. = Flatocerus dentifemura Zheng, 2003 syn. nov. Material examined. Two males and two females , PR China : Guizhou , Jiangkou ( Fanjingshan Mountains , Fig. 6 , a), 27°52′20.8′′N , 108°47′5.5′′E , 300 m , 30 July 2016 , coll. Ling-Sheng Zha. Two junior nymphs ( one male and one female ), PR China : Hunan , Dongkou ( Xuefengshan Mountains , Fig. 6 , b), 27°33′N , 110°39′E , 800–900 m , 12 September 2016 , coll. Ling-Sheng Zha. Notes. Phaesticus moniliantennatus was originally described from Fujian , PR China ( Günther, 1940 ). Podgornaya (1991) recorded the species from northern Vietnam . The species is similar to F. daqingshanensis from Guangxi ( Jiang & Zheng, 1998 ), F. dentifemura from Guangxi ( Zheng, 2003 ), F. guizhouensis from Guizhou ( Wang, 1992 ), F. nankunshanensis from Guangdong and Guangxi ( Zheng, 2005 ), and F. wuyishanensis (= F. chishuiensis , = F. nigrifemura , = F. nigritibialis ) from Guangxi, Guangdong, Guizhou, Fujian, and Hunan ( Ding et al ., 2017 ). Their main differences from these allied species are: 1) width of vertex (generally 0.9–1.3 time as wide as one eye, and generally in females slightly wider than in males); 2) prozonal carinae and interhumeral carinae (invisible, barely visible, or visible; inconspicuous); 3) hind pronotal process (varies from nearly reaching the apices of hind femora to surpassing the middle of hind tibiae, in males generally longer than in females); and 4) hind wings (similar to hind process, vary from nearly reaching to slightly surpassing the apex of hind process, in males generally longer than in females). However, all these differences are minor, which is why it is not logical to separate them into different species. Geographically, they were all reported from adjacent regions (northern Vietnam , Guangxi, Guangdong, Guizhou, Fujian, Hunan). Ding et al . (2017) described the specimens from Guizhou as F. wuyishanensis , and synonymized F. chishuiensis , F. nigrifemura , and F. nigritibialis with F. wuyishanenis ; Skejo (2017) identified these specimens as P. moniliantennatus , and considered F. dentifemura , F. nankunshanensis , F. nigrifemura , and F. nigritibialis as synonyms of P. moniliantennatus . For these reasons, we combined these allied species into one species. Distribution ( Fig. 1 ). Northern Vietnam , PR China ( Guangxi , Guangdong , Guizhou , Fujian , Hunan ).