This Specimen has been sold.
.72" Flexicalymene Trilobite - LaPrairie, Quebec
This is a .72" long, Flexicalymene trilobite from LaPrairie, Quebec. The preparation is excellent retaining the pustules that are often air abraded away. Both of its cheeks are tightly attached which is not often the case with these. There is some restoration on the back-right edge of the tail.
Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago). They were one of the most successful of the early animals on our planet with over 25k described species, filling nearly every evolutionary niche. Due in large part to a hard exoskeleton (shell), they left a excellent fossil record.