Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
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Current identification/main database link: Prymnesium parvum Carter 1937; emend. Green et al. 1982
Compiled data
Original Description
Body scales 0.36-0.37 µm x 0.25-0.27 µm, of two types in two layers: scales of the inner layer with a narrow inflexed rim, a central thickening on the distal face, and a radial fibrillar pattern on both faces; scales of the outer layer similar but with relatively tall upright rims.
Chloroplasts two, lateral and parietal, yellow-green to olive, lobed or dissected, each with an immersed pyrenoid. Nucleus central between the chloroplasts, Golgi body parabasal. Reserve metabolite probably chrysolaminarin (leucosin) accumulated in a posterior vacuole. Peripheral muciferous bodies and usually several lipoidol globules present.
Cysts ovoid, 9.3-10.8 µm x 6.0-6.4 µm, with a simple sub-anterior pore, the latter 2.75- 3.00 µm in diameter; wall composed of layers of scales with electron-dense siliceous material deposited on the distal surfaces of the outermost scales.
Green, J. C., Hibberd, D. J. & Pienaar, R. N. (1982). The taxonomy of Prymnesium (Prymnesiophyceae) including a description of a new cosmopolitan species, P. patellifera sp. nov., and further observations on P. parvum N. Carter. British Phycological Journal. 17: 363-382. gs References:
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Prymnesium patellifera: Catalog entry compiled by Jeremy Young. Viewed: 17-2-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=54866 Go to Archive.is to create a permanent copy of this page - citation notes |
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