Juan Carlos Munoz / Fossil of extinct perch fish (Priscacara sp) from the Eocene period, Wyoming, USA

John Cancalosi / Fossil of Snapping turtle juvenile {Chelydridae} Eocene period, Wyoming, USA

SINCLAIR STAMMERS / Fossil of the fish (Diplomystus dentatus) from the Eocene period, Green River Formation, Kemmerer, Wyoming, USA. 55 million years old. Composite panorama high resolution image.

Graham Eaton / Fossil Stingray (Heliobatis radians) from the Eocene period, Green River Formation, Wyoming, USA

John Cancalosi / Fossil Catfish from the Eocene period, Green River Formation, Wyoming

John Cancalosi / Fossilised Softshell turtle, from the Eocene period, Specimen Courtesy Geo Decor, Green River Formation, Wyoming, USA

John Cancalosi / Fossil Catfish (Astephus antiguis) from the Eocene period (50 mya) Germany

John Cancalosi / Fish fossil {Priscacara liops} from Eocene period, Wyoming, USA

John Cancalosi / Fossil turtle from Eocene period {Chelydridae}

Jeff Vanuga / Paleontologist cleaning fish fossil (Priscacara liops) Fossil Butte NM, Wyoming, USA.

Jeff Vanuga / Palm frond fossil, Sabalites sp, eocene period, . Fossil Butte NM, Wyoming, USA.

Jeff Vanuga / Fossil fish - Diplomystus dentatus- eating Knightia eocaena, Fossil Butte NM,

Jeff Vanuga / Fossil bat from eocene period, Fossil Butte NM, Wyoming, USA.

Jeff Vanuga / Bird fossil, Messetorais neactica, Eocene period, Fossil Butte NM, Wyoming, USA.

Jeff Vanuga / Gar fish fossil, eocene period, Leptisosteus simplex, Fossil Butte NM, Wyoming, USA.

Jeff Vanuga / Crocodile fossil, Leidyosuchus sp.,Eocene period, Fossil Butte NM, Wyoming, USA.

Jeff Vanuga / Fossil bat from eocene period, Fossil Butte NM, Wyoming, USA.

John Cancalosi / Fossil frog {Eopeiobates wagneri} Eocene period 55-34 mya Messel. W Germany

John Cancalosi / Fossil bird from Eocene period in Messel, Germany.

John Cancalosi / Fossil plant - willow from Eocene period in Green River Formation,Wyoming. 50 million years old

John Cancalosi / Bat fossil {Palaeochiropteryx tupaiodon} Eocene period. Messel, Germany

John Cancalosi / Frog fossil Eocene period Messel, Germany

John Cancalosi / Snake fossil from Eocene period, Messel, Germany

Adrian Davies / Fossil of a Scaphopod {Antalis striata} from Eocene period, Barton Beds, England, UK

John Cancalosi / Fossil frog {Eopeiobates wagneri} Messel fn, West Germany Eocene period 55 -34 mya

Adrian Davies / Fossil bivalve {Arctica morrisi} x 0.5 Eocene period, Oldhaven Beds, UK 55 - 34 mya

Adrian Davies / Fossil fish {Knightea eocaena} x 0.75, Eocene period, found in Wyoming, USA 55 - 34 mya

Adrian Davies / Fossil fruit of stemless palm {Nipa burtini} Eocene period, London Clay, London UK 55 - 34