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Calamites (horsetails) are characterized by a stiff central stem or trunk with regular intervals of whorls of upswept leaves (similar to inverted umbrellas)
The Mississippian Age is also known as "The Age of Crinoids
which includes amphiopods and isopods (sow bugs)
considering it to be a combination of folklore
Like other pachycephalosaurids
Stylemys nebrascensis (fossil tortoise/turtle) Ouranosaurus Calamites (horsetails) are characterized byOligocene Age White River Formation Wyoming Stylemys was a dry land tortoise found in the Oreodont beds (Middle Oligocene) of the White River badlands of South Dakota and northwestern Nebraska. They are also quite common in the late Eocene and early Oligocene White River badlands of eastern Wyoming. Stylemys was first described in 1851 by Dr. Joseph Leidy. It is the earliest discovered fossil turtle in America. This specimen is one of the few ever
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