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trilobite    
n. 三叶虫

三叶虫

trilobite
n 1: an extinct arthropod that was abundant in Paleozoic times;
had an exoskeleton divided into three parts


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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, 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
  • 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
  • Trilobite - Description, Habitat, Image, Diet, and Interesting Facts
    Everything you should know about the Trilobite Trilobite is an extinct arthropod which disappeared from Earth's oceans about 252 million years ago
  • How trilobites conquered prehistoric oceans - Natural History Museum
    More than 20,000 species of trilobite have been described If you’re looking for a ‘typical trilobite’, Richard says the two-centimetre-long Calymene is a prime example
  • The Fascinating World of Trilobite Fossils
    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 humans by hundreds of millions of years
  • 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
  • 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: 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





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