Osteichthyes

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Osteichthyes Class Sarcopterygii
Superorder Crossopterygii
Coelocanth
Devonian lungfish
Superorder Dipnoi (lungfish)
Australian lungfish
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Coelocanth
3
ribs
Interlocking vertebrae
Labyrinthodont
leg
girdle
Crossopterygian
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Class Amphibia Subclass Labyrinthodontia
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Class Amphibia Subclass Lissamphibia Order Anura
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Class Amphibia Subclass Lissamphibia Order Urodela
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Class Amphibia Subclass Lissamphibia Order Apoda
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Amniotic Egg
bathes embryo
waste removal
Diffusion of gases
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Evolution of Lobefin Fishes and Amphibians
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Class Reptilia Order Testudines (Chelonia)
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Class Reptilia Order Crocodilia
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Class Reptilia Order Squamata
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Class Reptilia Order Rhycocephalia