This Specimen has been sold.
1.1" Wide Enrolled Pliomera Trilobite - Russia
This is a beautiful, 1.1" wide, enrolled Pliomera fischeri trilobite from the Ordovician deposits near St. Petersburg, Russia. This unusual species is not seen very often on the market but I find it way more interesting than the typical asaphids from there. It would be about 2" long if outstretched and there is no repair or restoration.
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.