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Updated: August 4, 2026
Among the fossils very common in fresh-water deposits are the shells of Cypris, a minute bivalve crustaceous animal. Chara medicaginula; fossil. The seed-vessels and stems of Chara, a genus of aquatic plants, are very frequent in fresh-water strata. These seed-vessels were called, before their true nature was known, gyrogonites, and were supposed to be foraminiferous shells.
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