Leonaspis Trilobite Fossil DX1855

Trilobite Fossil Approx. Dimensions: 2.5 x 2.5 x 1.5 inches Approx. Weight: 123 grams Leonaspis Trilobite Hamar L'Aghdad Limestones Djebel Issoumour Area Anti-Atlas Mts., Morocco Middle Devonian Age (380 million yrs) Acrylic base and mineral putty are not included. This is a genuine trilobite fossil from Morocco that has been prepared by an expert. Great care was taken to remove the hard matrix and expose as much detail as possible from this little trilobite. Trilobites (meaning "three lobes") are 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 (521 million years ago) and they flourished throughout the lower Paleozoic before slipping into a long decline, when, during the Devonian, all trilobite orders except the Proetida died out. The last extant trilobites finally disappeared in the mas