Nannotax3 - ntax_non_cocco - Braarudosphaera bigelowii ALT Nannotax3 - ntax_non_cocco - Braarudosphaera bigelowii ALT

Braarudosphaera bigelowii ALT

Classification: ntax_non_cocco -> Haptophytes -> Prymnesiales -> Genera incertae sedis -> Braarudosphaera -> Braarudosphaera bigelowii ALT
Sister taxa: B. bigelowii ALT


Citation: Braarudosphaera bigelowii ALTERNATE PHASE
taxonomic rank: Species
Basionym: Braarudosphaera bigelowii

Catalog entries: Chrysochromulina parkeae

Original description: Cells motile, elongate, ovate, 10-26 µm long, 5-10 µm wide, dorsoventrally compressed. Two fiagella and one haptonema arising close together at one end; fiagella equal, smooth, homodynamic, 8-20 µm long; haptonema shorter than fiagella 2.5-4.5 µm long. Plastids two, golden-brown, lateroparietal.
Scaly investiture present, visible with light microscope. Scales of four forms;

Type images:


The SEM images included here of specimens observed in the plankton seem likely to be the same taxon since they show large and small body scales, with no axial cross or spine and long spines at each end arising from irregular-shaped bases. However, it is not clear if the structure of the spine bases is the same as in the type illustrations.  [my interpretation - JRY 2023]

Biology & life-cycles

DNA and cultures studies have shown that this form, which was previously previously regarded as a distinctive species of Chrysochromulina, is actually the motile phase of Braarudosphaera bigelowii.

See also: Braarudosphaera bigelowii ;

Geological Range:
Last occurrence (top): Extant. Data source:
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source:


Green, J. C. & Leadbeater, B. S. C. (1972). Chrysochromulina parkeae sp. nov. [Haptophyceae] a new species recorded from S.W. England and Norway. Journal of the Marine Biological Association of the United Kingdom. 52: 469-474. gs


Braarudosphaera bigelowii ALT compiled by Jeremy R. Young viewed: 3-3-2024

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