A Three superimposed electric organ discharge (EOD) waveform recordings of Cryptomyrus ogoouensis holotype CUMV 98155 (Macaulay Library #197475) recorded at 23.2 °C, head positivity upwards, X-axis = 1 millisecond, Y-axis tick marks indicate 20% of EOD peak-to-peak height; P0, P1, P2 mark the positive and negative excursions in the waveform, P0 highlighted by 20× amplification; red dots indicate onset of P0, onset of P1 and offset of P2, respectively B Power spectrum of EOD waveforms in A; red “+” symbols mark peak frequency and frequencies -3 dB below peak at 4300 Hz.