Calymene Trilobite | Morocco

SPECIES Flexicalymene sp. AGE Late Ordovician LOCATION Anti-Atlas Region, Morocco FORMATION Ktaoua Group   **Receive ONE hand selected Calymene Trilobite**   Species size are approximately 2" to 3" and are hand selected for quality. Calymene trilobites are preserved as internal molds, essentially formed a natural three-dimensional fossil. Calymene species are a fairly common, economical fossil which are a must-have for any collection!  Trilobite, any member of a group of extinct fossil arthropods easily recognized by their distinctive three-lobed, three-segmented form. Trilobites, exclusively marine animals, first appeared at the beginning of the Cambrian Period, about 542 million years ago, when they dominated the seas. Like many invertebrate animals living today, including crustaceans, spiders and insects, trilobites were arthropods, belonging to the phylum Arthropoda.