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  • 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
  • What were trilobites? - Oxford University Museum of Natural History
    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 the Palaeozoic Era, for nearly 300 million years
  • Trilobite - Description, Habitat, Image, Diet, and Interesting Facts
    Trilobites belong to the phylum Arthropoda, making them distant relatives of modern insects, spiders, and crustaceans Their name, “trilobite,” literally means “three lobes,” a reference to their distinctive body plan A trilobite’s body is divided both longitudinally and transversely
  • How trilobites conquered prehistoric oceans - Natural History Museum
    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 in Australia However, scientists now think they’re unlikely to be related to trilobites
  • 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
  • Trilobites, Earths Fascinating Prehistoric Arthropods - Geology Science
    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
    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 relate to trilobite origins, evolution, and classification
  • Trilobites: Ancient Arthropods of the Paleozoic Seas - FossilEra
    What Is a Trilobite? 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
  • 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





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