Drotops armatus Phacopid Moroccan Trilobite

This plate displays a rarely seen example of a trilobite related to the more common "Phacops" Drotops megalomanicus found in the Devonian deposits of region Ma'der near Erfoud, Morocco. This one is different in large measure due to the fact that there is a profusion of spines projecting from all surfaces, even the eyes! There are four varieties known, distinguished by the type and placement of the spines. This one has been prepared on a pedestal of matrix so you can see the hypostome (support for the mouthparts). Armatus means armed; to what purpose could all these spines be put? Fish had just recently evolved true jaws, and the armament here was a response to predation pressures. There are fully NINETY spines preserved here, making this a wonderful example of an evolutionary salvo in the predator/prey arms race.

Also see: Moroccan Trilobites