deleted


Classification: Coccolithophores -> hidden -> deleted
Sister taxa: deleted, sandbox,


Daughter taxa: (blue => in age window 0-300Ma)

Elongate, narrow scapholiths. Morphologically comparable with the extant Calciosolenia brasiliensis (Lohmann 1919), but fossil specimens have tended to be classified as Calciosolenia (or Scapholithus) fossilis.


Two cycls of nodes on tube inner wall, none on distal shield
Large (>10µm) species of Clausicoccus with small to medium sized central area.
Like C. mediterranea but BCs with central mound divided into two nodes; rims broader


Similar to D. mariposa but more roundd in proifle




Complex fasciculiths - formed of two or three discrete cycles; without fenestrae on the column


Coccoliths elliptical with moderately high walls and no inner structure, dimorphic with low and high liths. Perforate wall fabric. FRESHWATER
6 rayed form with moderately long free rays; alternate free rays are ornamented and smooth
6 long free rays at two levels



BCs central area with continuous cover of rather irregular plates;
CFC process ca. 2.3 µm high with broad conical calyx of four plates with finely serrated margin, base with cross-bars.


Coccolith distal rim smooth; irregular tiles in central area
Coccosphere dimorphic, CFCs with spine
Elliptical reticulofenestrids with narrow central area (just less than rim width) spanned by central plug surrounded by perforations.

Like S. abies/moriformis but smaller, <4µm & base broad
Medium to large with moderate spine; basal elements well-separated and strongly curved so lower part parallel to length of sphenolith; overall oultine resembles needle-nose pliers.


Like D. exilis but with straight ridges on the rays


Not present in the Pliocene
Like H. carteri but pores large. (Early-Middle Miocene)



Lenticular species with narrow flanges and robust lath cycle.
earlier D. variabilis -like species
6-rayed discoaster with strong bifurcations; central-area narrow and with only weak bosses.

Taxonomy:

Farinacci & Howe catalog pages:

Search data:
Tags
MetricsLith size: 0->0µm;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in stage). Data source:

Plot of occurrence data:

References:


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deleted compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-7-2018

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