Geological Range: Last occurrence (top): at top of (100% up, 0Ma, in "Holocene" stage). Data source: Total of ranges of the species in this database First occurrence (base): within (-Ma, base in "Holocene" stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
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References:
Cramer, F. H. & Diez, M. d. C. R. (1972). Subsurface Section from Portuguese Guinea Dated by Palynomorphs as Middle Silurian. Bulletin of the American Association of Petroleum Geologists. 56(11, Part 1): 2271-2272. gs
Missing or ambiguous references: Vanguestaine 1978;
Acritax - Acritax_Camb - Timofeeviaby: Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-10-2024