Trilobite Fossil 

Species - Calymene

Age - 480 / 445 Million Years Old 

Ordovician Period

Discovered - Tiskawine Mountain - Alnif, Morocco 

 

* One Trilobite per order!

* Each piece is unique in size, shape, color, etc.

* Our choice Trilobite only!

 

** Ordovician Period **

The Ordovician  is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period 485.4 million years ago (Mya) to the start of the Silurian Period 443.8 Mya.

 

** What is a Trilobite? **

Trilobites are a group of extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (521 million years ago), and they flourished throughout the lower Paleozoic before slipping into a long decline, when, during the Devonian, all trilobite orders except the Proetida died out. The last extant trilobites finally disappeared in the mass extinction at the end of the Permian about 252 million years ago. Trilobites were among the most successful of all early animals, existing in oceans for almost 270 million years, with over 20,000 species having been described.

 

By the time trilobites first appeared in the fossil record, they were already highly diversified and geographically dispersed. Because trilobites had wide diversity and an easily fossilized exoskeleton, they left an extensive fossil record. The study of their fossils has facilitated important contributions to biostratigraphy, paleontology, evolutionary biology, and plate tectonics. Trilobites are often placed within the arthropod subphylum Schizoramia within the superclass Arachnomorpha (equivalent to the Arachnata), although several alternative taxonomies are found in the literature. More recently they have been placed within the Artiopoda, which includes many organisms that are morphologically similar to trilobites, but are largely unmineralised.

 

Trilobites evolved into many ecological niches; some moved over the seabed as predators, scavengers, or filter feeders, and some swam, feeding on plankton. Some even crawled onto land. Most lifestyles expected of modern marine arthropods are seen in trilobites, with the possible exception of parasitism (where scientific debate continues). Some trilobites (particularly the family Olenidae) are even thought to have evolved a symbiotic relationship with sulfur-eating bacteria from which they derived food. The largest trilobites were more than 45 centimetres (18 in) long and may have weighed as much as 4.5 kilograms (9.9 lb).

 

Trilobite Fossil - Calymene

SKU: Trilobite Fossil - TFOP215
$5.00Price
  • Smoky Mountain Relic Room offers a 30 return policy with proof of purchase.

     

    -Limited Lifetime Authenticity Guarantee-

    The Smoky Mountain Relic Room stands behind the items we sell with a limited lifetime guarantee. We will exchange any item for store credit if the item sold is found by a certified authenticator not to be the authentic artifact, fossil, meteorite, or mineral that we advertised it as being. A letter, specific to the artifact, fossil, meteorite, or mineral in question, from a certified authenticator (in the business under the occupation-specific to the item in question), must be brought in with the item for the return to be acceptable. This guarantee is for the lifetime of the initial purchaser only. See the Relic Room Manager, downstairs inside Smoky Mountain Knife Works, for more information. Original receipt required for exchanges.

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