Trilobite fossil. Fossilised Asaphus kowalewskii trilobite. The Asaphus group lived throughout the Lower and Middle Ordovician periods (around 505- 458 million years ago). The trilobites are an extinct group of marine arthropods with a hard,segmented shell that is divided into 3 sections. Most,like A. kowaleskii,were bottom dwellers,feeding on and living in organic sediment on the ocean floor. This animal had well-developed eyes which protruded out of the sediment on long stalks. Found in St Petersburg,Russia | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Stammers, Sinclair |
Taille de l’image : | 3543 px × 3001 px |
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Property Release : | Non requis |
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