Orthis Mollusk

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A mollusk radiate from the Paleozoic time, Orthis testudinaria.

Keywords

geology, early life form, Paleozoic, Silurian period, mollusk radiate, Orthis testudinaria

Galleries

Other Mollusks

Source

Dana, James D. New Text-Book of Geology (New York: Ivison, Blakeman & Company, 1883) 214

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