Chrysochromulina vexillifera

Original description: Protoplast c. 8 x 6 μm, with twoplastids; the flagella (two) c. 20 μn and the haptonema longer. Scale-case with 14 terminal spines at each end. Spines not exceeding 15 μm and often less, each tapered, pointed and supported at the base by four struts adnate to the surface of a strongly convex and flexible base- plate somewhat smaller than the outer plate-scales elsewhere on the periplast. Outer plate-scales flat, approaching 2 μm diam. though usually a little less, the contour round or elliptical, with a narrow thickened margin projecting slightly on the distal face, the latter also carrying four cruciform adnate ridges resembling vestigial struts no longer supporting a central spine and usually arranged obliquely in a configuration recalling St Andrews cross on the flag of Scotland. The distal surface between struts completely covered by fine threads radiating towards the centre in bundles initiated near the scale edge; patterning on the obverse (proximal) face the usual arrangement of radiating ridges in quadrants. An underlayer of numerous small oval plates also present close to the plasmalemma, each 0.5 x 0.8 μm with a narrow raised rim and faint surface patterning of radial ridges on the proximal face but virtually patternless on the distal face.

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:

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested.
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: affinity not established

Chrysochromulina vexillifera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-7-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20123 Go to Archive.is to create a permanent copy of this page - citation notes

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