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 …

Trilobite, any member of a group of extinct fossil arthropods easily recognized by their distinctive three-lobed, three-segmented form. Trilobites were exclusively marine animals that first appeared 521 …

What were trilobites? 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 …

Ten orders of trilobites are recognized, into which 20,000+ species are placed. Learn more about trilobite morphology, anatomy, ecology, behavior, reproduction, and development, and how they …

Jul 5, 2023 · 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” …

Trilobites will have evolved from more primitive arthropodan organisms. There are older animals that look a bit like trilobites, such as the seemingly segmented Spriggina from 550-million-year-old rocks …

Aug 1, 2025 · Trilobites are more than just prehistoric curiosities. They are time travelers in stone. Each fossil offers a snapshot of a vanished world—a living creature frozen in a moment that predates …

Trilobites were some of the first multicellular animals to live in the world's oceans. Their fossil record extends back 530 million years to the early part of the Cambrian Period and indicates that trilobites …

Because of their diversity and an easily fossilized exoskeleton, they left an extensive fossil record with some 17,000 known species spanning Paleozoic time. Trilobites have been important in …

Trilobites were most numerous and abundant at the end of the Cambrian Period (about 500 million years ago). Trilobites lived in marine waters. Some trilobites could swim, others burrowed or crawled …