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Fossil plant Macroneuropteris scheuchzeri from Grundy County, Illinois. Macroneuropteris is a genus of Carboniferous seed plants best known for the species Macroneuropteris scheuchzeri, a medium-size tree that was common throughout the late…

Straparollus planodorsatus (Meek & Worthen, 1860) - fossil snail from the Mississippian of Ohio, USA. (apical view; ~2.0 centimeters across at its widest)

The Maxville Limestone is the only Middle to Late Mississippian-aged stratigraphic unit in…

triceratops by Charles Knight.jpg
Triceratops illustration by Charles R. Knight, 1904.
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