Myxiniformes Petromyzontifor mes Chimaeriformes Squaliformes Lamniformes Rajiformes Myliobatiformes Lepidosirenifor mes Coelacanthiform es Polypteriformes Acipenseriforme s Lepisosteiforme s Amiiformes Hiodontiformes Elopiformes Anguilliformes Clupeiformes Cypriniformes Characiformes Siluriformes Esociformes Salmoniformes Percopsiformes Gadiformes Lophiiformes Atheriniformes Cyprinodontifor mes Gasterosteiform es Scorpaeniformes Perciformes Pleuronectiform es Acanthodii Placodermi Craniata Chordata Holocephali Elasmobranchii Sarcopterygii Actinoptergyii Cephalaspid- omorphi Myxini Teleostei Ostarioph ysi Acanthopter ygii Ichthyology 425--Orders and higher t 6 7 8 9 10 11 lab Phylum Superclass Subphylum Class Subclass Division Superorder Osteichthyes Chondrichthyes Gnathostomata ? ?