Trilobites are a class of extinct arthropod marine creatures. This specimen is of the genus Flexicalymene which lived between 425-500 million years ago. Flexicalymene are used as an index fossil in the Ordovician Period.
It can be difficult to grasp how long ago these creatures lived. For perspective, dinosaurs lived closer in time to us than these trilobites lived to dinosaurs.
Era: Ordovician (500–425 million years ago)
These photos are representative of our current inventory. You may not receive these exact specimens. We prioritize sending the biggest specimens first.
Thanks to their easily fossilized exoskeletons, we now have a very extensive history of these creatures. We know of about 17,000 species which lived from 521 million years ago until the Permian–Triassic extinction event 252 million years ago.
This table contains the geological time periods of the past 2.5 billion years on Earth to aid in understanding age immense age of these fossils.(Ma = Mega-annum = 1,000,000 years)
|EON||ERA||PERIOD||EXTENT (Ma)||DURATION (Ma)|
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