Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Pisces Class Actinopterygii Woodward, 1891 - ray-finned fishes Order Gasterosteiformes Gill, 1872 - sticklebacks Family Gasterosteidae Günther, 1859 - sticklebacks