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 %>
Deunff, J. (1961). un microplancton a_ Hystrichosphe_res dans le Tre_madoc du Sahara. Revue de Micropaléontologie. 4: 37-52. gs Deunff, J., Gorka, H. & Rauscher, R. (1974). Observations nouvelles et precisions sur les Acritarches a large ouverture polaire du Paleozoique inferieur. Translated Title: New observations and details on lower Paleozoic acritarchs with large polar apertures. Geobios. 7(1): 5-18. gsReferences:
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