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Umbellasphaeridium huecospinosum
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Stratigraphy
Description
Literature
Notes
Year
Author
Title
1964b
Cramer, F.H.
Microplancton from three Palaeozoic formations in the Province de Leon, NW Spain.
1976
Cramer, F.H. and Diez, M.del C. R.
Acritarchs from the La Vid Shales (Emsian to lower Couvinian) at Colle, Léon, Spain.
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