Phylum Chordata Bateson, 1885 - chordates Count: - Subphylum Vertebrata Cuvier, 1812 - vertebrates Count: - Pisces Count: [*] 5c58o469f; †4c41o87f Class Actinopterygii Woodward, 1891 - ray-finned fishes Count: - Order Gymnotiformes Rafinesque, 1810 - American knifefishes Count: - Family Gymnotidae Rafinesque, 1815 - nakedback knifefishes Count: -