CLASS CYCLOSTOMATA 

ORDER Myxiniformes

HAGFISHES

Family Myxinidae

ORDER Petromyzontiformes Berg, 1940

LAMPREYS

Family Petromyzontidae

POUCHED LAMPREYS

Family Geotriidae

MORDACID LAMPREYS

Family Mordaciidae

INFRAPHYLUM GNATHOSTOMATA Gegenbaur, 1874

CLASS CHONDRICHTHYES Huxley, 1880 

SUBCLASS ELASMOBRANCHII Bonaparte, 1838

INFRACLASS EUSELACHII Hay, 1902

SUBDIVISION SELACHII

SUPERORDER GALEOMORPHI Compagno, 1973

ORDER HETERODONTIFORMES Berg, 1940

BULLHEAD SHARKS

Family Heterodontidae

ORDER ORECTOLOBIFORMES Applegate, 1972

WHALE SHARKS

Family Rhincodontidae

BLINDSHARKS

Family Brachaeluridae

BAMBOOSHARKS

 Family Hemiscylliidae

ORDER LAMNIFORMES Berg, 1958

SAND TIGERS

Family Odontaspididae

CROCODILE SHARKS

Family Pseudocarchariidae

MEGAMOUTH SHARKS

Family Megachasmidae

GOBLIN SHARKS

Family Mitsukurinidae

MACKEREL SHARKS

Family Lamnidae

BASKING SHARKS

Family Cetorhinidae

THRESHER SHARKS

Family Alopiidae

ORDER CARCHARHINIFORMES Compagno, 1973

CATSHARKS

Family Pentanchidae

FINBACK CATSHARKS

Family Proscylliidae

 BARBELED HOUNDSHARKS

Family Leptochariidae

WEASEL SHARKS

Family Hemigaleidae

CATSHARKS

Family Scyliorhinidae

FALSE CATSHARKS

Family Pseudotriakidae

HOUNDSHARKS

Family Triakidae

REQUIEM SHARKS

Family Carcharhinidae

HAMMERHEAD SHARKS

Family Sphyrnidae

SUPERORDER SQUALIMORPHA 

ORDER HEXANCHIFORMES de Buen, 1926 

ORDER SQUALIFORMES Goodrich, 1909

KITEFIN SHARKS

Family Dalatiidae

SLEEPER SHARKS

Family Somniosidae

GULPER SHARKS

Family Centrophoridae

LANTERNSHARKS

Family Etmopteridae

ROUGHSHARKS

Family Oxynotidae

DOGFISHES

Family Squalidae

BRAMBLESHARKS

Family Echinorhinidae

ORDER PRISTIOPHORIFORMES Berg, 1958

ORDER SQUATINIFORMES de Buen, 1926

ANGELSHARKS

Family Squatinidae