The earliest formally described fossil specimen is a cranium from the Fur Formation Lower Eocene in Denmark (54 mya). Other trogoniform fossils have been found in the Messel pit deposits from the mid-Eocene in Germany (49 mya), and in Oligocene and Miocene deposits from Switzerland and France respectively. The oldest New World fossil of a trogon is from the comparatively recent Pleistocene (less than 2.588 mya).
the earliest formally described fossil specimen is a cranium from the fur formation lower eocene in denmark (54 mya) other trogoniform fossils have been found in the messel pit deposits from the mid-eocene in germany (49 mya) and in oligocene and miocene deposits from switzerland and france respectively the oldest new world fossil of a trogon is from the comparatively recent pleistocene (less than 2588 mya)