Description

Trilobite Psychopyge Elegans

Devonian Period  Morocco

Size 5×4.

Trilobites are extinct marine arthropods that form the class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most successful of all early animals, existing in oceans for almost 270 million years, with over 22,000 species having been described.

The largest trilobites were more than 70 centimetres (28 in) long and may have weighed as much as 4.5 kilograms (9.9 lb). The last trilobites disappeared in the end-Permian mass extinction event about 250 million years ago, by which time only a few species remained.

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