Halved fossil of the aquatic vertebrate Tullimonstrum gregarium,known as the Tully monster. This creature,which grew up to 35 centimetres in length,had a shovel-like tail (at right in top fossil) and a trunk-like snout with keratin teeth. It's eyes were at either end of a horizontal bar far back on its head. Fossils,dating to 300 million years ago,have only been found in the Mazon Creek fossil beds of Illinois,USA. X-ray studies of the fossils have shown that T. gregarium was closely related to modern lampreys | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / US Department of Energy |
Taille de l’image : | 3963 px × 2655 px |
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Property Release : | Non requis |
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