Two species of trilobite — Eldredgeops (left) and Bellacartrightia (right) — found at Penn Dixie.

Trilobites are extinct marine arthropods that dominated the shallow seas of the Paleozoic era. They became extinct in a global disaster Penn Dixie visitors find several types of trilobites: Eldredgeops (abundant), Greenops (uncommon), Bellacartrightia (rare), Pseudechenella (rare), Dipleura (very rare), and others.

True trilobite enthusiasts should check out Penn Dixie’s trilobite gallery. Click on the images to see a larger version with full caption.