Geological Range: Last occurrence (top): within Late Oligocene Sub-Epoch (23.03-28.09Ma, top in Chattian stage). Data source: First occurrence (base): within Late Eocene Sub-Epoch (33.89-37.75Ma, base in Priabonian stage). Data source:
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Theocyrtis perysinos, synonyms included - Theocyrtis perysinos;