This Specimen has been sold.
3" Spiny Psychopyge Trilobite - Short Snout Species
This is a 2.2" long, example of the short snout varienty of Psychopyge. This rare species has a significantly short rostrum, as well as much smaller spines than Psychopyge elegans. The distinctive rostrum and all of the spines have been prepared free standing. There is a bit of separation between some of the segments, hence the reduced price.
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.