Solisphaera palmula

Classification: Coccolithophores -> Syracosphaerales -> Rhabdosphaeraceae -> Solisphaera -> Solisphaera palmula
Sister taxa: S. blagnacensis, S. emidasia, S. helianthiformis, S. galbula, S. turbinella, S. tegula, S. palmula, C. miocaenica, D. moori, S. sp.,


Citation: Solisphaera palmula Bown 2016
Rank: Species

Distinguishing features: CCs very small, with trapezoidal protrusions, flat or slightly curved; possible BCs flat (Palaeocene)

Farinacci & Howe catalog pages: Solisphaera palmula *

Morphology remarks: Very small, narrow, flat or slightly curving, tapered-trapezoid processes formed from miniscule, overlapping, elongate elements. The elements are arranged in 15–20 rows that slope from upper left to lower right.
Two simple coccoliths, with very narrow rim, central plate and no process, are associated with a group of specimens that may be a collapsed coccosphere; these may represent polymorphic coccoliths similar to those seen in extant species of Solisphaera.
Differentiation: See the discussion of comparisons with extant species for S. tegula. Solisphaera palmula is smaller, narrower and more elongate than S. tegula. [Bown 2016]

Size: length 1.6–2.2μm; width 0.8–1.1μm [Bown 2016]

Search data:
TagsLITHS: planolith, elliptical, CA: process, PROCESS: flaring, spine, x-section-flat,
CSPH: not known, DETAILS: ca_disjunct,
MetricsLith size: 1.5->2.5µm;
Sources: lith size from OD
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP6 zone (58.97-59.54Ma, top in Thanetian stage). Data source: Bown 2016
First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Bown 2016]

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Solisphaera


    Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs


    Solisphaera palmula compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-4-2020

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