The South American lungfish,Lepidosiren para- doxus. Lungfish were common in Devonian and Carboniferous times (400-300 million years ago),but only six species are known today. They are a group of amphibian-like,air-breathing fish,thought to be the ancestors of the terrestrial vertebrates. The South American lungfish has paired lungs,located on either side of the throat,and can survive for long periods if the river or lake in which it lives dries up. The larvae of L. paradoxus have an adhering organ (sucker) and tree-like external gills,but these degenerate and disappear as the fish grow | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nuridsany, Claude / Perennou, Maria |
Bildgröße: | 3804 px × 2508 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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