Trilobite - Wikipedia One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most successful of all early animals, existing in oceans for almost 270 million years, with over 22,000 species having been described
Trilobite | Cambrian period, Extinction, Arthropod, Facts | Britannica 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 521 million years ago near the beginning of the Cambrian Period (538 8 million to 485 4 million years ago), when they dominated the seas
What were trilobites? - Oxford University Museum of Natural History Trilobites are a group of extinct marine arthropods that first appeared around 521 million years ago, shortly after the beginning of the Cambrian period, living through the majority of the Palaeozoic Era, for nearly 300 million years
Trilobite Trilobites are one of the earliest known complex life forms and left behind an extensive fossil record, making them a subject of great interest to paleontologists The name “trilobite” originates from their distinctive body structure, which is divided into three distinct longitudinal lobes
A Guide to the Orders of Trilobites Learn more about trilobite morphology, anatomy, ecology, behavior, reproduction, and development, and how they relate to trilobite origins, evolution, and classification Explore trilobite biostratigraphy, paleobiogeography, persistence across geological time, and their ultimate extinction
Trilobites: The Most Successful Animals in Earth’s History? Trilobites were marine arthropods, members of the same broad group that includes insects, spiders, and crustaceans Their bodies were protected by a hard exoskeleton made primarily of calcite and chitin, which fossilized easily and explains why trilobite remains are so abundant in ancient rocks
Trilobite - U. S. National Park Service Trilobites are arthropods, meaning they are related to insects, spiders, and crustaceans A 3D model This model shows a rock with a trilobite fossil on the surface The model can be rotated and tilted using a computer interface Collected from the Bright Angel Shale in Grand Canyon National Park
Five Places to See Trilobites in the United States Trilobites, or “bugs” as they’re often called within the paleontology community—they look eerily similar to insects and contain three main body segments as well, including the cephalon (head),