Trilobites proliferated and thrived throughout the Paleozoic world, comprising one of the earliest known groups of arthropods. They flourished to over 600 species at their zenith, including many with exotic exoskeletons and unique feeding strategies. They are probably most closely related to modern horseshoe crabs.
**great gift for kids starting their own fossil collection**
Ships in 2-3 days from Arizona. Please allow 1 week delivery time.