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Sarcopterygii is traditionally the class of lobe-finned fishes, consisting of lungfish and coelacanths. Most taxonomists who subscribe to the cladistic approach include within this group the subclass Tetrapoda, which in turns consists of all species of four-limbed vertebrates:
- Coelacanthimorpha
- Dipnoi
- Tetrapoda
- Amniota
- AmphibiaSubclass Labyrinthodontia extinct Subclass Lepospondyli extinct Subclass Lissamphibia Urodela Anura Gymnophiona The class Amphibia consists of all tetrapods (four-legged vertebrates) that do not have amniotic eggs. Amphibians generally spend part of their
This level of taxonomy is in flux however; the membership of Sarcopterygii is likely to change, and it may even be discontinued as a classification.
Chordates
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