Visualization of advertisement calls of Megophrys qianbeiensis sp. nov., M. sangzhiensis, and M. spinata A1 waveform showing one note of Megophrys qianbeiensis sp. nov. A2 sonogram showing one note of Megophrys qianbeiensis sp. nov. A3 waveform showing 25 notes of one call of Megophrys qianbeiensis sp. nov. A4 sonogram showing 25 notes of one call of Megophrys qianbeiensis sp. nov. B1 waveform showing one note of M. sangzhiensis B2 sonogram showing one note of M. sangzhiensis B3 waveform showing 38 notes of one call of M. sangzhiensis. B4 sonogram showing 38 notes of one call of M. sangzhiensis C1 waveform showing one note of M. spinata C2 sonogram showing one note of M. spinata C3 waveform showing 20 notes of one call of M. spinata C4 sonogram showing 20 notes of one call of M. spinata.