Apteronotus leptorhynchus:

Venezuela - AMNH 91010, 4 ex.; AMNH 91011, 1 ex.; FMNH 70012, 5 ex., 1 cs; FMNH 102100, 8 ex.; INHS 28280, 1 ex.; INHS 31842, 4 ex.; INHS 31863, 4 ex.; USNM 194141, 2 ex.; Guyana - CAS 62333, paratype, 1 ex.; FMNH 53294, holotype; FMNH 53295, paratype, 1 ex.; INHS 49524, 1 ex.