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Horsetail: Calamites suckowi (PRI 50479) 3D Model
Fossil specimen of a stem base of the horsetail (Equisetophytes) Calamites suckowi from the Pennsylvanian of Pennsylvania (PRI 50479). Note the characteristic nodes (horizontal lines) and internodal ribs (vertical lines). Specimen is on display at the Museum of the Earth, Ithaca, New York. Length of fossil is approximately 21.5 cm. Model by Emily Hauf.
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