Trilobites originated during the Cambrian era, flourished through the Paleozoic era, declined during the Devonian era, and finally became extinct in the Permean mass extinction event.
In total there were live trilobites on the earth for about 290 million years.
There were more than 150,000 kinds of trilobites and they lived in the Cambrian period. They were the longest living arthropods in their time. People call the Cambrian period , "the age of the trilobites."
"The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (), and they flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders except Proetida died out."
~ Wikipedia
Trilobites came into existence during the Cambrian period, and were killed off in the Permian Extinction. They are likely one of the most successive species in history.
1 mm to 72 cm
Cambrian Period
Cambrian Period............by R.E
Tribolite Tribolite trilobite
yeah
Trilobites were associated with the Paleozoic era, from the Cambrian to the Permian.
they were index fossils because they were found everywhere, had distinct characteristics, and lived for a short period of time.
Trilobite
Trilobites existed in the Devonian period, but they were not exclusive to it. They were abundant before the period and continued to exist afterward, though in much less abundance.
Its 3-lobed body.
because they changed slowly through time(:
Trilobite+sand=crab
rock and plankton