Taxonomy:
Original description: Motile cells sphaeroidal to ovoid with a flattened flagellar pole and the opposite pole slightly tapering, some metaboly, 3-5 (exceptionally 2.5-7.5) µm in diameter. Two equal homodynamic flagella, 2-3 times the cell diameter in length, with a distinct knobbed mucronate tip more than twice the flagellar diameter in length visible with the electron microscope. One haptonema slightly shorter than theflagellawhen fully extended, arising with them at the flattened cell pole. Periplast covered by very thin sculptured scales, nearly circular to ellipsoid, sometimes hexagonal to octagonal, 0.2 x 0.3 to 0.5 x 0.7 µm in size. Cells uninucleate, no stigma. Chromatophores usually 1 or 2, sometimes 4, 8 or none, deep golden-brown, in motile phase saucer-shaped, parietal, with medium sized globular body (pyrenoid ?) on inner face placed near the margin nearest the flagellar pole; in non-motile phase deeply lobed or stellate. Oil and leucosin produced. Muciferpus bodies localized near the non-flagellar pole. Nutrition holophytic and/or phagotrophic. Non-toxic to fish. Asexual reproduction of pigmented and non-pigmented forms in motile phase by fission into 2 or 4 daughter-cells; in non-motile phase by fission of amoeboid cells to produce 4 walled daughter-cells which probably liberate motile phase.
Type images:Farinacci & Howe catalog pages: Chrysochromulina minor
Morphology:
Lith size: 0->0µm; |
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:
Edvardsen, B., Eikrem, W., Throndsen, J., Sáez, A. G., Probert, I. & Medlin, L. K. (2011). Ribosomal DNA phylogenies and a morphological revision provide the basis for a revised taxonomy of the Prymnesiales (Haptophyta). European Journal of Phycology. 46(3): 202-228. gs Manton, I. & Leedale, G. F. (1961). Further observations on the fine structure of Chrysochromulina minor and C. kappa with special reference to the pyrenoids. Journal of the Marine Biological Association of the United Kingdom. 41: 519-526. gs Parke, M., Manton, I. & Clarke, B. (1955). Studies on marine flagellates. II. Three new species of Chrysochromulina. Journal of the Marine Biological Association of the United Kingdom. 34: 579-604. gsReferences:
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Prymnesium minor compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-6-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20393 Go to Archive.is to create a permanent copy of this page - citation notes |
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