Here is a inexpensive example of a relative rare trilobit of the species Gerastos lisarasus from the Ceratages couche of Zireg. | |||
Location: | Jbel Zireg, , Maider Reg. , Morocco | ||
Size: | about 28 mm long | ||
Age: | Middle Devonian , Eifilian (about 390 mill. y.o.) |