 (2) Antecedents were present in the fins of early sarcopterygian fish.However, 2008 research which created a three-dimensional reconstruction of a Panderichthys, a coastal fish from the Devonian period 385 million years ago, shows that these animals already had many of the homologous bones present in the forelimbs of limbed vertebrates.For example, they had fin radials, bones similar to rudimentary fingers but positioned in the arm-like base of their fins.