Sarcopterygii

Lobe-finned fishes Temporal range: Late Silurian–Present, 425–0 Ma[1] PreꞒ Ꞓ O S D C P T J K Pg N
From top to bottom and left to right, examples of sarcopterygians: Guiyu oneiros, West Indian Ocean coelacanth, Australian lungfish and the tetrapodomorph Panderichthys rhombolepis.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Euteleostomi
Clade:	Sarcopterygii Romer, 1955
Subgroups
?†"Psarolepids" Guiyu Sparalepis Psarolepis Achoania Actinistia – coelacanths & relatives †Onychodontiformes Rhipidistia Dipnomorpha – lungfish & relatives Tetrapodomorpha – four-limbed vertebrates & relatives

Sarcopterygii (/ˌsɑːrkɒptəˈrɪdʒi.aɪ/; from Ancient Greek σάρξ (sárx) 'flesh', and πτέρυξ (ptérux) 'wing, fins') — sometimes considered synonymous with Crossopterygii (from Ancient Greek κροσσός (krossós) 'fringe') — is a taxon (traditionally a class or subclass) of the bony fishes known as the lobe-finned fishes. The group Tetrapoda, a mostly terrestrial superclass including amphibians, sauropsids (reptiles, including dinosaurs and therefore birds) and synapsids (with mammals being the only extant group), evolved from certain sarcopterygians; under a cladistic view, tetrapods are themselves considered a subgroup within Sarcopterygii.

The known extant non-tetrapod sarcopterygians include two species of coelacanths and six species of lungfishes.