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STUDIES - Fossils around the world
Invertebrate - Arthropods

Phylum Arthropoda (arthropods) includes the insects, arachnids, crustaceans, and other fossil organisms like trilobites. Arthropods are characterized by their jointed limbs and cuticles (they own an eso-skeleton), which are mainly made of α-chitin; the cuticles of crustaceans and trilobites are also biomineralized with calcium carbonate.



Trilobites (“three-lobes”) are extinct arthropods that form the class Trilobita. They appeared in the Early Cambrian period and flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Late Devonian extinction, all trilobite orders, with the sole exception of Proetida, died out. The last of the trilobites disappeared in the mass extinction at the end of the Permian about 250 million years ago (m.y.a.).

Asaphidae ordovicien
Country: Marocco



Shrimp are swimming, decapod crustaceans classified in the infraorder Caridea, found widely around the world in both fresh and salt water. Adult shrimp are filter feeding benthic animals living close to the sea bottom. They can live in schools and can swim rapidly backwards. Shrimp are an important food source for larger animals from fish to whales. They have a high resistance to toxins in polluted areas, and may contribute to high toxin levels in their predators. Together with prawns, shrimp are widely caught and farmed for human consumption.

Country: Lebanon

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