Trilobite

Trilobites (/ˈtraɪloʊbaɪt/, /ˈtrɪloʊbaɪt/; meanin "three lobes") are a well-kent fossil group o extinct marine arthropods that form the class Trilobita.

Trilobites Temporal range: Early Cambrian[1][2] – Late Permian, 521–251.9 Ma PreЄ Є O S D C P T J K Pg N
Kainops invius, early Devonian
Paradoxides sp., late Cambrian
Scientific classification
Kinrick:	Animalia
Phylum:	Arthropoda
Subphylum:	†Trilobitomorpha
Cless:	†Trilobita Walch, 1771[3]
Orders
Agnostida Asaphida Corynexochida Harpetida Nectaspida Redlichiida Lichida Phacopida Proetida Ptychopariida