Taxonomy:
Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage).
First occurrence (base): within (-Ma, base in "Holocene" stage).
Plot of occurrence data: <% graph_caption %>
Volkova, N. A. (1990). middle and upper Cambrian acritarchs in the East-European Platform. Doklady Akademii Nauk SSSR. 454: 1-116. gs Missing or ambiguous references: Umnova 1975; References:
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