Prymnesium faveolatum

Original description: Motile cells elongate to very elongate (8-9 µm x 4-5 µm), posteriorly tapered, anteriorly slightly obliquely truncated. Appendages subapically inserted. Two subequal heterodynamic flagella (14- =16 µm) terminating in a hair tip. Short, non-coiling haptonema (2-2.3 µm). Cells covered by two types of scales. Several layers of proximal body scales, elliptical to oval (0.38-0.41 µm x 0.28-0.30 µm) with a radial fibrillar pattern in quadrants (about 15 lines per quadrant) on both faces, and on the distal face a narrow inflexed rim, and a central thickening forming a variably pronounced 'X' shape along the intersection of the quadrants. The single outer layer consists of elliptical scales (0.30-0.36 µm x 0.25-0.27 µm) with a pattern of radiating fibrils in quadrants (about 15 lines per quadrant) on both faces, the distal face also with a peripheral upright wall (0.07-0.08 µm high) and secondary raised alveolate ornamentation with side branches joining the rim. Two yellowish brown pariétal chloroplasts, each with an immersed lenticular pyrenoid, lie along almost the entire length of the cell. Other cell contents include a median nucleus which lies in between the chloroplasts, and a parabasal Golgi body. A vacuole often prominent in the posterior part of the cell. Peripheral muciferous bodies present. Swimming motion rapid, spiralling around the long axis of the cell.

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: Prymnesium

Prymnesium faveolatum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-9-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20390 Go to Archive.is to create a permanent copy of this page - citation notes

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