Tiktaalik roseae,artwork. This extinct lobe-finned fish lived during the Late Devonian period (375 million years ago). It had fishlike fins with thin ray bones and scales. However,it also had a flattened skull similar to a crocodile along with a mobile neck and sturdy shoulders,lungs and ribs,which are seen in tetrapods (four-legged vertebrates). In 2004,a Tiktaalik roseae fossil was found in the Canadian Arctic. When scientists later analysed its skull,in 2008,it was found to demonstrate a key transitional stage between fish and tetrapods. Tiktaalik roseae is thought to have lived in shallow water,using its fins to prop itself up | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / National Science Foundation |
Bildgröße: | 1909 px × 1201 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |