page_title: Sarcopterygii
section_title: Taxonomy
hierarchical_section_title: Sarcopterygii / Classification / Taxonomy
caption_attribution_description: English: Australian lungfish (Neoceratodus forsteri)
context_page_description: Sarcopterygii —sometimes considered synonymous with Crossopterygii —is a clade of the bony fish whose members are known as lobe-finned fish. The group Tetrapoda, a superclass including amphibians, reptiles, and mammals, evolved from certain sarcopterygians; under a cladistic view, tetrapods are themselves considered a group within Sarcopterygii.
  The living non-tetrapod sarcopterygians include two species of coelacanths and six species of lungfish.
context_section_description: The classification below follows Benton 2004, and uses a synthesis of rank-based Linnaean taxonomy and also reflects evolutionary relationships. Benton included the Superclass Tetrapoda in the Subclass Sarcopterygii in order to reflect the direct descent of tetrapods from lobe-finned fish, despite the former being assigned a higher taxonomic rank.
  Subclass Sarcopterygii
  †Order Onychodontida
  Order Actinistia
  Infraclass Dipnomorpha
  †Order Porolepiformes
  Subclass Dipnoi
  Order Ceratodontiformes
  Order Lepidosireniformes
  Infraclass Tetrapodomorpha
  †Order Rhizodontida
  Superorder Osteolepidida
  †Order Osteolepiformes
  †Family Tristichopteridae
  †Order Panderichthyida
  Superclass Tetrapoda
caption: Queensland lungfish
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