Radiographs showing caudal vertebrae in a recently collected Heteromormyrus pauciradiatus and in the H. pauciradiatus holotype NMW 22417. Vertebrae are numbered from first post-cranial centrum. A caudal peduncle of non-type Heteromormyrus pauciradiatus SAIAB 85120_SAF518-09(originally identified as lineage K4) from the Lucala River of Angola with 41 total vertebrae. Identical vertebral count was found in five other radiographed specimens of this species B caudal peduncle of Heteromormyrus pauciradiatus holotype NMW 22417, showing total vertebral count of 37, four fewer caudal vertebrae than a normal individual, and supernumerary neural and hemal spines at vertebrae 31, 32, and 34.