Trilobite

Fossil range: Cambrian - Permian

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• Agnostida
• Redlichiida
• Corynexochida
• Lichida
• Phacopida
• Proetida
• Asaphida
• Harpetida
• Ptychopariida
• Proposed order
• Nektaspida

Trilobites are extinct arthropods in the class Trilobita. They appeared in the Cambrian era and flourished throughout the lower Palaeozoic before slowly declining to extinction. The last of the trilobites disappeared in the mass extinction at the end of the Permian 250 million years ago. Trilobites are well-known, possibly the second most famous fossil group after the dinosaurs, and are the most diverse group of animal species preserved in the fossil record, consisting of eight, possibly nine, orders and over 15,000 species. Most were simple, small marine animals that filtered mud to obtain food.

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Trilobite: Physical description ►



 

Cambrian: The Cambrian is a major division of the geologic timescale that begins about 542 million years before the present (BP) at the end of the Proterozoic eon and ended about 488.3 million years BP with the beginning of the Ordovician period (ICS, 2004). It is the first period of the Paleozoic era of th...

Permian: :Permian is also an alternative name for the Permic languages...

Class: Class may refer to:...