|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
Parent taxon (Chiastozygaceae): Loxolith coccoliths with variably-developed proximal/inner-cycles and a central-area spanned by axial, non-axial or diagonal crossbars or a single transverse bar. LM image includes both unicyclic and bicyclic types. Outer rim clockwise-imbricate.
This taxon: Elliptical murolith with narrow rim and wide vacant central area.
Farinacci & Howe catalog pages: Jakubowskia *
|LITHS: murolith, elliptical, CA: vacant, CROSS-POLARS: R-prominent,|
|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:
Jakubowskia compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-3-2023
Short stables page link: https://mikrotax.org/Nannotax3/index.php?id=773 Go to Archive.is to create a permanent copy of this page - citation notes