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Osteichthyes
bony fishes
advanced jaws
paired fins present
lungs present
either homocercal or heterocercal tail
Subclass Actinopterygii
ray finned fishes (lepidotrichia)
most are teleosts
Subclass Sarcopterygii
lobe finned fishes & tetrapods
fleshy, lobed fins
articulating fins
Chondrichthyes
cartilaginous fishes
placoid scales
ceratotrichia
typically large-bodied predators
Order Chimaeriformes
deep sea dwellers
heavy dorsal spine
cartilaginous skeleton
jaws
paired fins
Subclass Elasmobranchii (Sharks, skates, & rays)
heterocercal caudal fin
placoid scales
ceratotrichia
jaws
paired fins
claspers in males
Lamprey
eel-like body
jawless
no paired fins
Hagfishes
jawless
degenerate eyes
no paired fins