TRILOBITE

Trilobite

Trilobites are a well-known fossil group of extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods. 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. Trilobites finally disappeared in the mass extinction at the end of the Permian about . The trilobites were among the most successful of all early animals, roaming the oceans for over ...

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trilobite

Noun

  1. An extinct arthropod of the class Trilobita, whose body had three large lobes.


The above text is a snippet from Wiktionary: trilobite
and as such is available under the Creative Commons Attribution/Share-Alike License.

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