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  • ...ast= [[Allison R. Palmer|Palmer]]|first= A.R.|year= 1967|title= Trilobites of East-Cental Alaska|journal= Geological Survey Professional Paper|issue= 559 ...ate Middle [[Cambrian]]. Its remains have been found in the United States, Greenland, Denmark, China, Sweden, the Russian Federation, and Kazakhstan. Its headsh
    3 KB (451 words) - 15:44, 27 April 2025
  • ...dium of fossil marine animal genera (Trilobita entry)| journal = Bulletins of American Paleontology| volume = 364| issue =|page=560| publisher =| locatio ...m 501 to 490 million years ago during the [[Dresbachian]] [[faunal stage]] of the late [[Cambrian Period]].<ref name="Sepkoski"/>
    1,019 B (120 words) - 15:44, 27 April 2025

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