DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Fossil trilobites are very ancient, now extinct organisms that lived from the early Cambrian, over 500 million years ago, well into the Permian period, some 250 million years ago. They were hard shelled, bottom-dwelling sea organisms. The specimen in this photo, Asaphus punctatus, is a genus that lived during the Ordovician period in Scandinavia and northwest Russian realms. It is from Vipovitsy, St Petersburg, Russia and its overall length is 85 mm.
Model release not required. Property release not required.