Geological Range: Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source: First occurrence (base): within (-Ma, base in "Holocene" stage). Data source:
Plot of occurrence data:
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References:
Loeblich, A. R. , Jr. & Tappan, H. (1978). Some Middle and Late Ordovician microphytoplankton from central North America. Journal of Paleontology. 52(6): 1233-1287. gs
Acritax - Acritax_Camb - Actinotodissusby: Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 10-6-2023