|Daughter taxa: (blue => in age window 0-800Ma)|
Small to medium, elliptical placolith coccoliths with broad central-areas spanned by lattice-like grills that are dominated by transverse bars.
Small, elliptical placolith coccoliths with broad central-areas spanned by lattice-like grills that are dominated by longitudinal bars.
Medium to large, elliptical placolith coccoliths with broad central-areas spanned by a plate formed from small non-aligned rectangular elements.
Medium sized, bicyclic placolith with dark outer-cycle, slightly brighter inner cycle and relatively wide central-area (approximately same width as shields). In SEM a central-area net is evident.
Specimens which cannot be assigned to established species
Distinguishing features: Placolith coccoliths with a wide central-area typically spanned by multi-element lattice-like grills or imperforate plates.
Farinacci & Howe catalog pages: Craticullithus *Search data:
|Tags||LITHS: placolith, elliptical, CA: grill, |
CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
|Metrics||Lith size: 3.5->9µm;|
Last occurrence (top): in lower part of Ypresian Stage (28% up, 53.7Ma, in Ypresian stage). Data source: Total of range of species in this database
First occurrence (base): near base of Thanetian Stage (8% up, 59Ma, in Thanetian stage). Data source: Total of range of species in this database
Plot of occurrence data:
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