Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Pisces Class Actinopterygii Woodward, 1891 - ray-finned fishes Order Siluriformes Rafinesque, 1810 - catfishes Family Chacidae Bleeker, 1858 - squarehead catfishes