|Daughter taxa (time control age-window is: 0-800Ma)|
Elliptical murolith with narrow rim and wide vacant central area.
Specimens which cannot be assigned to any established species
Distinguishing features: Elliptical murolith with narrow rim and wide vacant central area.
Farinacci & Howe catalog pages: Jakubowskia *Search data:
|Tags||LITHS: murolith, elliptical, CA: vacant, CROSS-POLARS: R-prominent,|
|Metrics||Lith size: 6->13µm;|
Last occurrence (top): in upper part of Ypresian Stage (67% up, 50.5Ma, in Ypresian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Selandian Stage (4% up, 61.5Ma, in Selandian stage). Data source: Total of range of species in this database
Plot of occurrence data:
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