26MM Brittlestar Petraster Starfish Fossil Ordovician Age Blekus Morocco COA For Sale

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26MM Brittlestar Petraster Starfish Fossil Ordovician Age Blekus Morocco COA:
$39.99

Location: Kataoua Formation, Blekus Morocco

Weight: 5.1 Ounces 

Starfish Dimensions: 36MM 

Dimension: 3.2 Inches Long, 1.8 Inches Wide, 0.8 Inches Thick (Plate)

Comes with a Certificate of Authenticity. 

The item pictured is the one you will receive. 

Brittlestar Petraster

This intriguing limestone slab was extracted from Middle-Upper Ordovician (about 450 million yrs. old) rocks in the Anti-Atlas part of the Atlas Mountains of Morocco. This slab was once part of an ancient seafloor that was uplifted and Incorporated into mountains about 80 million yrs. ago, long after the seafloor turned into thick layers of rock.The fossils preserved in this slab include early echinoderms (spiny-skinned marine invertebrate animals) known as eocrinoids and ophiuroids (brittle stars). The brittle stars are clearly recognizable, with their five prehensile arms and the compact central body. They look very similar to living species of brittle stars, most of which live in reefs, and shallows near shore and deeper water environments, and feed on small organisms suspended in the water.Eocrinoids are more unusual, with long thin tapering stems, and clusters of arm-like appendages at the opposite end. These animals are probably the Eocrinoid Ascocystites, a suspension feeder that would have extracted food directly from the water column, filtering out micro-organisms with the help of those appendages.Despite the name, eocrinoids were unrelated to crinoids (seal Lilies) and differ in several morphological features from ancient and modern crinoids. However, like many fossil crinoids, their elongated stem allowed for attachment to hard substrates and the possibility of raising themselves higher off the seafloor.There appear to be several larger individuals along with a number of much smaller ones. Those smaller animals may be juveniles of the larger form or a different species. Do you notice how the smaller individuals often seem to be in close contact with the brittle stars? We are often led to wonder whether the brittle stars were feeding on the smaller eocrinoids.

Please be aware of the nature of fossils:

Being buried under the ground for millions of years under tons of pressure tends to be rough. No fossil comes out of the ground whole and perfect. Most fossils have undergone some restoration, while others are altered by man simply to enhance their presentation in different ways. The workers in Morocco do a very professional job, of unearthing and preserving these natural treasures.  These are part of the natural beauty of the fossil and are not considered defects.

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