This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Ampyx nasutus Middle Ordovician Lynna Formation St. Petersburg region Russia Houston Museum of Natural Science DSC. An Ampyx nasutus trilobite Order Asaphida Family Raphiophoridae collected from the Lynna Formation St Petersburg region Russian Republic from the Middle Ordovician Specimen on display at the Houston Museum of Natural