Fossil graptolites (Monograptus sp.). Graptolites were colonial animals which lived in abundance in Palaeozoic seas. A colony consists of one or more branches along which are arranged cup-like thecae,each of which originally housed a single animal. The slanting arrangement of the thecae causes the saw-blade appearance of the colony | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Natural History Museum, London |
Bildgröße: | 3732 px × 4683 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |