Bioacoustics of Synagelides shimian

Diagnosis. The new species resembles S. hamatus Zhu, Zhang, Zhang & Chen, 2005 and S. forkiforma Yang, Zhu & Song, 2007 , but it differs from them in the following characters: male: (1) the retrolateral tibial apophysis has three forks at its tip with one fork hidden behind in retrolateral view ( Figs 14D , 16B ; whereas the forks are absent in S. hamatus , see Zhu et al . 2005 : fig. 12E; only one fork on the ventral surface in S. forkiforma , see Yang et al . 2007 : fig. 2D); (2) the dorso-retrolateral tibial apophysis is triangular in shape in retrolateral view, and the tip is level with the base of the retrolateral tibial apophysis ( Figs 14D , 16B ; whereas it is almost oval in shape, with the tip significantly lower than the base of the retrolateral tibial apophysis in S. hamatus , see Zhu et al . 2005 : fig. 12E); (3) the retrolateral proximal branch of the median apophysis is long and the tip is slightly pointed ( Figs 14A, D , 16A, B ; whereas it is short and the tip is rounded in S. forkiforma , see Yang et al . 2007 : fig. 2D and Wang et al . 2020 : fig. 3B, C); female: (1) the epigynal pocket is almost sub-triangular ( Figs 15A–D , 16C, D ; whereas it is almost half oval in S. hamatus and S. forkiformis , see Zhu et al . 2005 : fig. 12B, C and Wang et al . 2020 : fig. 4A–C); (2) both sides of the septum sink inward in the middle, taking on a shape like the Chinese character " 工 " ( Figs 15A , 16C ; whereas it is like " 人 " in S. hamatus , see Zhu et al . 2005 : fig. 12B; they are not sink inward in S. forkiformis see Wang et al . 2020 : fig. 4A).