Fossils For Sale | In Stone Fossils

Calymene Trilobite | Morocco

$9.00 Regular price


Calymene sp.


Upper Ordovician


Anti-Atlas Region, Morocco


Ktaoua Group


Species size are approximately 2" to 3" and are handselected 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.