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Arctinurus boltoni, Middle Silurian, Rochester Shale, Niagara County, New York, USA - Houston Museum of Natural Science - DSC01577.JPG
Arctinurus boltoni, Middle Silurian, Rochester Shale, Niagara County, New York, USA - Houston Museum of Natural Science - DSC02014.JPG
Agnostus_pisiformis_fossil_trilobite_(Alum_Shale_Formation,_upper_Middle_Cambrian;_Honsater,_Vastergotland,_Sweden)_(15263805372).jpg
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Arctinurus boltoni - National Museum of Nature and Science, Tokyo - DSC07761.JPG
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