Here is a negative (impression) of a rare Sphaerocoryphe thompsoni from Starfishbeds of Girvan as a inexpensive example. | |||
Location: | Lady Burn, Gilvern, Ayrshire, Scottland | ||
Size trilobite: | about 25 mm long | ||
Age: | Upper Ordovician, Ashgill , Drumuck gr., Starfishbeds, (about. 449 Mill. y.o.) |