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 were exclusively marine animals that first appeared 521 million years ago near the beginning of the Cambrian Period and persisted into the Permian Period
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
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
Trilobites: Ancient Arthropods of the Paleozoic Seas Trilobites are extinct members of the phylum Arthropoda, the same broad group that includes insects, spiders, crabs, and lobsters They belong to their own class, Trilobita, and are not direct ancestors of any living animal, though they share many traits with modern arthropods
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
Trilobite Website | AMNH Trilobites were among the first dominant multicellular lifeforms to inhabit our planet’s seas The Trilobita, an extinct class of Paleozoic marine arthropods, was made up of 10 orders, over 150 families, about 5,000 genera and over 22,000 described species