Preliminary study on the diversity of Orthoptera from Kuala Belalong Field Studies Centre, Brunei Darussalam, Borneo Author Tan, Ming Kai Author Abdul Wahab, Rodzay bin Haji text Journal of Orthoptera Research 2018 27 2 119 142 http://dx.doi.org/10.3897/jor.27.24152 journal article http://dx.doi.org/10.3897/jor.27.24152 1937-2426-2-119 3. Gymnogryllus unexpectus trusmadi Gorochov, 2011 Fig. 9 A-C Remarks.- The understory can be filled with the loud male calling song of this large cricket during dusk (around 7 pm). The male lives in a burrow and produces loud and high-pitched (peak frequency = 4.2 kHz) trilling (mean pulse intervals = 9.1 ms) calls. As they can be quite abundant, the amount of noise produced can be very loud and heard a distance away. Specimens from Kuala Belalong resemble the images and description by Gorochov (2011) and identification was verified by A.V. Gorochov.