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Classification of Fishes 
Order HYPEROARTIA 
Petromyzonide (Lampreys) 
Mordaciide 
Class ELASMOBRANCHII 
Subclass SELACHIT 
Order PLEUROPTERYGII 
Cladoselachide 
Order ACANTHODEI 
Acanthoesside 
Diplacanthide 
Ischnacanthide 
Order ICHTH YOTOMI 
Pleuracanthide 
Order NOTIDANI 
Hexanchide (Cow-sharks) 
Chlamydoselachide (Frill-sharks) 
Order CESTRACIONTES 
Cochliodontide 
Hybodontide 
Orodontide 
Heterodontide (Bull-head Sharks) 
Psammodontide 
Tamiobatide 
Order ASTEROSPONDYLI (GALEOIDEI) 
Scylliorhinide (Cat-sharks) 
Hemiscylliide 
Orectolobide 
Ginglymostomide (Nurse-sharks) 
Odontaspidide (Sand-sharks) 
Mitsukurinide (Goblin-sharks) 
Alopiide (Threshers) 
Pseudotriakide 
Lamnide (Man-eater Sharks) 
Cetorhinide (Basking-sharks) 
Rhineodontide 
Carchariide (Common Sharks) 
Sphyrnide (Hammer-head Sharks) 
Order TECTOSPONDYLI (SQUALOIDED) 
Squalide (Dog-fishes) 
Dalatiide 
Echinorhinide (Bramble-sharks) 
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