Cupulocrinus humilis (Cupulocinidae), Porocrinus sp. (Porocrinidae)
Geological Time: Middle Ordovician
Size (25.4 mm = 1 inch): Cupulocrinus: 35 mm long , 25 mm across with 50 mm associated stem, 28 mm long, 20 mm across, 18 mm long, 18 mm across Porocrinus: 45 mm long by 13 mm across Matrix: 125 mm by 135 mm
Fossil Site: Bobcaygeon Formation, Trenton Group, Simcoe County, Ontario, Canada
Code: RS61
Price: Sold
 Description:
This plate displays a fine grouping of Cladid crinoids found in the
Middle Ordovician Trenton Group deposits of Simcoe County, Ontario,
Canada. This one has 3 examples of Cupulocrinus humilis in fine 3-D
relief. The Cupulocrinidae are thought to be closely related to the
Flexibilia, but they themselves left no descendants. The example at
the far left is seen with a bryozoan, most likely a species of Batostoma.
The other uncommon crinoid is a Prorocrinus, seen in the very center
of the plaque. All are here as a result of a natural association,
not compositing. This substantial matrix plaque would make an excellent
addition to any crinoid collection. |
