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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Natural History Museum, London |
Taille de l’image : | 3732 px × 4683 px |
Model Release : | Non requis |
Restrictions : | - |