Nannotax3 - ntax_non_cocco - Chrysochromulina pyramidosa Nannotax3 - ntax_non_cocco - Chrysochromulina pyramidosa

Chrysochromulina pyramidosa

Classification: ntax_non_cocco -> Haptophytes -> Prymnesiales -> Chrysochromulinaceae -> Chrysochromulina -> affinity not established -> Chrysochromulina pyramidosa
Sister taxa: C. adriatica, C. ahrengotii, C. alifera, C. ephippium, C. pyramidosa ⟩⟨ C. cyathophora, C. megacylindra, C. microcylindra, C. pachycylindra ⟩⟨ C. apheles, C. discophora, C. elegans, C. lanceolata, C. latilepis, C. novae-zelandiae, C. orbiculata, C. pelagica, C. pontica, C. pseudolanceolata, C. quadrikonta, C. tenuispina, C. tenuisquama, C. vexillifera ⟩⟨ C. breviturrita, C. inornamenta, C. laurentiana


Citation: Chrysochromulina pyramidosa Thomsen 1977
taxonomic rank: Species
Basionym: Chrysochromulina pyramidosa Thomsen 1977

Catalog entries: Chrysochromulina pyramidosa

Original description: Cell saddle-shaped, 3 µm long x 4 µm wide; two flagella 10-13 µm long, and a haptonema 5-6 µm long. Scales of two types. Some are platelike , circular, approximately 0.7 µm in diameter, with a pattern of radiating ridges (24 in number), and 7-8 nearly equidistant concentric rings, the ring at the edge being thicker than the others. The second type of scales have a plate-like base which is constructed in a similar way with a diameter 0.8-0.9 µm, 27-28 radiating ridges, and 8-9 concentric rings. The innermost rings are equidistant, the distance between the outermost thicker ring and the next ring somewhat greater. From the margin of the plate four thick struts branch off creating a pyramidal superstructure.

Type images:

Geological Range:
Last occurrence (top): Extant. Data source:
First occurrence (base): within No known fossil record modern (0-0Ma, base in "Holocene" stage). Data source:


Thomsen, H. A. (1977). Chrysochromulina pyramidosa sp. nov. (Prymnesiophyceae) from Danish coastal waters. Botaniska Notiser. 130: 147-153. gs


Chrysochromulina pyramidosa compiled by Jeremy R. Young viewed: 8-12-2023

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