Distinguishing features: Elliptical pontosphaerid with central area plate crossed by prominent oblique ridges that are bright in cross-polarised light.
Farinacci & Howe catalog pages: Pontosphaera wilsonii *
Morphology remarks: Elliptical pontosphaerid with central area plate crossed by prominent oblique ridges that are bright in cross-polarised light.
Differentiation: Distinguised from other Pontosphaera by the distinctive oblique ridges than run across the coccolith. [Bown & Newsam 2017]
Size: Holotype L = 6.7μm (Paratype L = 7.4μm). [Bown & Newsam 2017]
|Tags||LITHS: murolith, elliptical, RIM: outer wall acw-imbricate, CA: bar-diagonal, bar-diagonal NW-SE, pores, bar, |
CSPH: not known, V-UNITS: outer-rim, V-prominent, R-UNITS: c-str, inner-rim, px-plate, R-prominent, DETAILS: ca_conjunct, rim-bicyclic, isogyres oblique, isogyres separated,
|Metrics||Lith size: 6->8µm; |
Sources: lith size from OD and slightly extended
Last occurrence (top): within NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: Bown & Newsam 2017
First occurrence (base): within NP15 zone (42.87-46.29Ma, base in Lutetian stage). Data source: Bown & Newsam 2017
Plot of occurrence data:
Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1104 Go to Archive.is to create a permanent copy of this page - citation notes