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Pachytheca in the Rhynie chert

Pachytheca in Rhynie chert. Diameter 3.8 mm.
The smooth, cuticle-like outside is striking.

Pachytheca in Rhynie chert (detail)

Detail of the photo above. The radially arranged tubes are clearly visible.
The inner zone is badly preserved. No details are visible.
Click here to se more details.
Coll. H.-J. Weiss, Rabenau, photos: H. Sahm, Dresden

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