Description
You will receive exactly this Calymene Trilobite Fossil - 66mm x 43mm x 25mm / 2 5/8 x 1 11/16 x 1Inches; 65g / 2.3 oz / 325Carat (see photo, the photos are taken under bright light, stand included)!.Trilobites are a fossil 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 era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders except Proetida died out..Calymene, genus of trilobites (extinct arthropods) dating from the Ordovician Period (505 to 438 million years ago). Well known in the fossil record, Calymene remains have been found in which impressions or actual remains of appendages are preserved. Calymene and its close relative Flexicalymene are frequently preserved as tightly rolled fossils. The rolling may be either a death position or a defensive one that the animal assumed to protect its soft, vulnerable underside..Each trilobite body segment bore a pair of jointed appendages. The forwardmost appendages were modified into sense and feeding organs. Most trilobites had a pair of compound eyes; some of them, however, were eyeless..(The above information is provided solely for informational purpose. Kindly note that all stones are offered for decorative purposes only. Please, handle your stones with great care, do not grind or crumble them, do not dip or add them into your food or drink, do not use any parts of them in any elixirs, potions, lotions etc. Always make sure you wash your hands before and after working with your crystals.)
