A superb split limestone positive and negative plate displaying fine, distinct detail of the extinct Ophiura brittle starfish. The plate has been exactingly prepared so not to disturbed the surface detail of the specimen, a double impression one to each half of the nodule, the preserved individual waves in the now solid limestone. It is suggested a massive event such as a tsunami or undersea earthquake, sent tons of silts over these sea dwellers, trapping and freezing in a few moments and subsequently for all time this individual and many other animals on the sea floor. Having been discovered about 420 million years later in Morocco, in what is now the western Sahara desert, we exhume the brittlestars and delight in opening up the prehistoric limestone to view the contents, sometimes we are very lucky to find a specimen of this quality and rarity.
Brittle Starfish Ophiuroidea, part of the order of Asteroids (Ophiuroides). Starfish. A double positive and negative plate displaying one excellently preserved specimen, the matrix being split open to reveal to mirror images of the same marine creature.
The genus type of this particular Brittle starfish Ophiura was found in Kataoua Kaid Errami fossil formation, Saharan Morocco. The geological age is Ordovician period around 440 million years ago.