Ceratarges cf. aries and Phacops sp.
Middle Devonian
Jebel El Otfal
Morocco

Incredible 57mm Ceratarges and 36mm Phacops on 120mm slab.

Ceratarges cf. aries and Phacops are two remarkable trilobites from the Devonian period, each with a unique look and story.

Ceratarges cf. aries is famous for its wild appearance—covered in long, curved spines that may have helped with defense or camouflage. It’s a rare and visually striking trilobite, often considered a collector’s favorite.

Phacops, on the other hand, is known for its large, crystal-like compound eyes and smooth, rounded body. It could roll up like a pill bug for protection, and its detailed vision made it a keen hunter or scavenger.

Together, they showcase the incredible diversity and adaptation of trilobites in Earth’s ancient oceans—one armored and spiny, the other alert and agile.