Edrioaster bigsbyi
Edrioasteroid
Ordovician
Verulam Formation
Brechin, Ontario, Canada A spectacular plate that in addition to the Edrioaster has a ventral view of the edrio Thresherodiscus
, the undescribed crinoid Cleiocrinus that goes right down to the holdfast and also a partial paracrinoid.
Size: 19 cm across the plate.
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