Harpes cf perradiatus
Trilobites Order Harpetida, Family Harpetidae
Koneprusia sp (?)
Trilobites Order Odontopleurida, Family Odontopleuridae
Geological Time: Middle Devonian
Size (25.4 mm = 1 inch): Harpes trilobite: 28 mm long by 22 mm wide Odontopleurid trilobite: 23 mm long by 18 mm wide (counting spines) on a 65 mm by 30 mm by 75 mm tall matrix
Fossil Site: Jorf, Morocco
Fossil Code: 17029
Price: $1495.00
 Description:
This specimen from Jorf is unusual for several reasons. First, it
displays two different orders of trilobites on the same plate, preserved
on two separate planes of the matrix. Second, both of them are a different
color, a result of differential uptake of minerals during deposition
and subsequent exposure to minerals in the ground water. It is a NATURAL
association, not a composite. I include a video taken during preparation.
Note that the Harpes evidently had a bad day several hundred million
years ago. There is pathology to the right side of the cephalic rim.
The balance of the posterior of the head shield is NOT buried in the
matrix. Note the distortion to the right anterior edge as well. The
trilobite survived the attack, only to die at some later date. While
the Odontopleurid looks more to me like a member of the genus Isoprusia,
the fact that there is a small central pygidial spine would be more
likely in a member of the genus Koneprusia. Whatever the case this
is a very unusual association plate. |
