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Keyword: oligocene

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  • Fossils of previously unknown beaver species found in Oregon

    06/05/2015 10:07:52 AM PDT · by Red Badger · 61 replies ^ | Jun 01, 2015 | Staff
    A fossilized skull and teeth from a newly described species of beaver that lived 28 million years ago have been unearthed in eastern Oregon. The fossils worked their way out of the soil within a mile of the visitor center at the John Day Fossil Beds National Monument, said the monument's paleontologist, Joshua Samuels. The find is significant, he said, because unlike the other species of ancient beavers found at the monument, this one appears related to the modern beaver, a symbol of Oregon found on the state flag. The others all went extinct. The species is named Microtheriomys brevirhinus....
  • Fossil Shows Fish Had Sucker On Its Back

    07/28/2013 3:14:40 AM PDT · by SunkenCiv · 12 replies
    Science Daily ^ | July 26, 2013 | University of Oxford
    'The remora sucker is a truly amazing anatomical specialisation but, strange as it may seem, it evolved from a spiny fin,' said Dr Matt Friedman of Oxford University's Department of Earth Sciences, lead author of the report. 'In this fossil the fin is clearly modified as a disc but is found on the back of the fish. It enables us to say that first fin spines on the back broadened to form wide segments of a suction disc. After the disc evolved, it migrated to the skull, and it was there that individual segments became divided in two, the number...