Sarcopterygian fish (Holoptychius quebecensis) from the Devonian period (417-354 million years ago).  This was an early lobe-finned bony fish, and a relative of Tiktaalik; the fishapod that used its limbs to walk out of water and onto land.
On display in ‘Evolving Planet’ at The Field Museum. 
 

Sarcopterygian fish (Holoptychius quebecensis) from the Devonian period (417-354 million years ago).  This was an early lobe-finned bony fish, and a relative of Tiktaalik; the fishapod that used its limbs to walk out of water and onto land.

On display in ‘Evolving Planet’ at The Field Museum.