Sarcopterygii
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Sarcopterygii is a clade of vertebrate animals which includes a group of bony fishes and all four legged land animals, including humans. The common name for this clade is lobe-finned fish.
Guiyu oneiros, the earliest-known bony fish, lived during the Late Silurian, 419 million years ago). It has the combination of both ray-finned and lobe-finned features, although analysis of the totality of its features places it closer to lobe-finned fish.
Tristichopterid Hyneria reached length up to 3.5 m (11 ft).
Tooth from the sarcopterygian Onychodus from the Devonian of Wisconsin
Latimeria Paris
Lungfish
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Lungfish, also known as dipnoans, are freshwater vertebrates belonging to the class Dipnoi. Lungfish are best known for their innovative respiratory system, including the ability to breathe air, and d
Sarcopterygii
…tetrapods. This mostly terrestrial clade of vertebrates are now recognized as having evolved from sarcopterygian ancestors and are most closely related to lungfishes. The lobed fins evolved into limbs, and foregut diverticulum eventually evolved into air-breathing lungs. These changes made it possible for tetrapods…
Neoceratodus forsteri, 2014 09 19
Lateral view of lungs of a dissected spotted lungfish (Protopterus dolloi)
Granddad, Shedd Aquarium, Chicago
South American lungfish