Rare Scotoharpes spasskii Russian Trilobite
In Free Standing Pose
Order Harpetida; Family Harpididae
Time: Middle Ordovician, Asery Horizon
Site: St. Petersburg Russia, Wolchow River Region
well-inflated example of a dramatic member of the Harpetida, this
is Scotoharpes spasskii. The creamy Calcite exoskeleton is complemented
by the white limestone matrix. The Harpetida is the newest Order
of trilobites, only recently having been erected. This one displays
the fine pitted cephalic ring (the cephalon itself is 35 by 32 mm)
diagnostic of many members. The trilobite has been prepared with
the edges of the winglike genals nearly free of matrix, with only
a small amount of matrix left as a protective shield.
trilobite is exceedling rare, with about one per year complete specimens
discovered; usually, only the cephalon is found.
see: Russian Trilobites