Trilobites first appeared in the Cambrian and were last seen in the Middle Permian.
Trilobites became extinct about 250 million years ago, in the Mesozoic Era.
Trilobites are extinct but they were marine animals.
The trilobites went extinct during the mass extinction at the end of the Permian period.
Trilobites have been extinct for a long time; there are none left for us to take care of.
The Trilobites.
Trilobites lived for 280 million years before they became extinct, from the Cambrian to the Permian.
You don't. Trilobites are extinct and are only found as fossils.
If you mean trilobites, they have been extinct for millions of years.
Scientists believe that trilobites reproduced sexually. These prehistoric and extinct creatures were a type of arthropod that probably laid eggs. Trilobites lived about 250 million years ago.
0.2 - 32 inches
First it is trilobites and trilobites are all extinct but their modern relative are the horseshoe crab, lobster and some other crabs
Trilobites, and eurypterids (giant marine scorpions). Ammonites are not arthropods but molluscs.