Gerastos sp (with reduced eye size)

Trilobites Order Proetida Family Proetidae
Geologic Age: Middle Devonian
Trilobite is 24 mm long
Jorf, Morocco
Comment: This Gerastos proetid trilobite has greatly reduced eye size compared to the typical member of family Proetidae. Another Gerastos trilobite from the same location in Jorf was blind with no eyes -- could this one be the evolutionary transitional form?

Also see: Moroccan Trilobites Evolutionary Secondary Blindness Among Trilobites Trilobite Eyes







Gerastos Proetida Trilobite

 Gerastos Moroccan Trilobite

Proetid Trilobite with reduced eye size