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heterodon is from the Eocene-age Wasatch Formation of Wyoming
Geological Petroleum
5 kilograms (3 to 7
Since then
Priscacara, Green River Fossil Fish Ouranosaurus heterodon is from the Eocene-ageThe genus Priscacara is perhaps the most popular of the Green River fish fossils. A member of the Family Priscacaridae, the name Priscacara means "primitive head". Shaped rather like a sunfish, the genus sports sturdy, protective dorsal and anal spines. Among the two species, liops and serrata, serrata is uncommon. Liops is the smaller species, never exceeding 6 inches, whereas serrata have been found up to 14 inches. The genus went extinct at the end
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