Revised identification key of Gomphomastacinae genera of China. 1. Antennae longer, with 25 segments, its length longer than hind femur....... Gomphomastax Brunner von Wattenwyl, 1898. 1’ Antennae shorter, with 11~22 segments, its length not longer than hind femur..................................... 2 2. Apex of hind femur without spine........................................................................ 3 2’ Apex of the hind femur with 1~5 spines................................................................... 6 3. Antennae shorter, with 11 segments, its length almost as long as width; head not exceeding compound eyes............................................................................................ Myrmeleomastax Yin, 1984. 3’ Antennae shorter, with 12~19 segments, its length longer than width; head exceeding compound eyes.................. 4 4. Antennae shorter, with 19 segments, reaching the basal part of hind femur in male; face with promontory, parallel on both sides................................................................................................................................................................................... Sinomastax Yin, 1984. 4’ Antennae shorter, with 12~15 segments, not reaching the basal part of hind femur in male; promontory of face wider between antennae............................................................................................. 5 5. Antennae 13~15 segments......................................................... Ptygomastax Bienko, 1959. 5’ Antennae 12 segments............................................................ Angulomastax Zheng, 1985. 6. Antennae with 21~24 segments.................................................... Phytomastax Bienko, 1949. 6’ Antennae with 15 segments........................................................... Pentaspinula Yin, 1979.

Published as part of Ge, Jun-Jie, Agrippine, Yetchom Fondjo Jeanne, Xu, Sheng-Quan & Huang, Huateng, 2021, Description of three new species of Gomphomastacinae (Orthoptera Eumastacoidea) from the east of Qinghai-Tibet plateau, China, pp. 419-427 in Zootaxa 5068 (3) on page 420, DOI: 10.11646/zootaxa.5068.3.6, http://zenodo.org/record/5707029