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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 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
  • Trilobite Fossils: Facts, Types, Identification Species Gallery
    Trilobites are among the most famous and collectible fossils on Earth This guide explains what trilobites were, how to identify the major body parts, where trilobite fossils are found, and how different trilobite groups changed through the Paleozoic Era
  • 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
  • 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
  • List of trilobite genera - Wikipedia
    This list of trilobites is a comprehensive listing of all genera that have ever been included in the Arthropod class Trilobita, excluding purely vernacular terms
  • 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





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