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Trilobita    
三叶虫; 三叶虫纲

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  • Trilobite - Wikipedia
    Trilobites ( ˈ t r aɪ l ə ˌ b aɪ t s, ˈ t r ɪ l ə- ; [4] [5] [6] meaning "three-lobed entities") are extinct marine arthropods that form the class Trilobita 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
  • 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 Although they became less abundant in succeeding geologic
  • Introduction to Trilobites | AMNH - American Museum of Natural History
    American Museum of Natural History 200 Central Park West New York, NY 10024-5102 Phone: 212-769-5100 Open daily, 10 am–5:30 pm Closed Thanksgiving Day and Christmas Day
  • Trilobite - Description, Habitat, Image, Diet, and Interesting Facts
    These creatures lived in the oceans until about 252 million years ago Before their extinction, they persisted on Earth for an impressive 300 million years Researchers place these extinct creatures in the taxonomic class Trilobita Read on to learn about the Trilobite
  • Trilobita - Digital Atlas of Ancient Life
    Though the phylogenetic relationships of the different trilobite groups are still being determined, as is the placement of the Trilobita within the Arthropoda, trilobites remain useful to paleontologists for biostratigraphy
  • Trilobites, Earths Fascinating Prehistoric Arthropods - Geology Science
    Trilobites are a group of extinct marine arthropods that existed for a staggering period of time, spanning over 270 million years They first appeared during the Early Cambrian period around 521 million years ago and became extinct during the mass extinction event at the end of the Permian period around 252 million years ago Trilobites are one of the earliest known complex life forms and left
  • Trilobite Facts: Amazing Animals That Existed Before The Dinosaurs
    Trilobite Olenoides superbus, found in the Upper Marjum Formation, Utah, USA It lived around 500 mya, during the Cambrian Period (An arthropod is a member of a vast group (called Arthropoda) of invertebrate animals
  • Trilobites, Subphylum Trilobita - ThoughtCo
    For the purpose of this article, we will follow the classification scheme published in Borror and DeLong's Introduction to the Study of Insects, and place the trilobites in their own subphylum – the Trilobita
  • What are trilobites? - The Australian Museum
    Trilobita is the most species-rich entirely extinct arthropod group In trilobites, the hard exoskeleton covering the dorsal body surface and its well marked segmentation (for example, the jointed segments of the thorax) are classic arthropod features
  • Trilobita Trilobites - Fossil
    Nine Orders of Arthropod Class Trilobita are recognized Trilobites particularly flourished in the oceans of the Cambrian and Ordovician periods, beginning around 540 million years ago, with a diminishing number of families persisting until the Permian





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