Catalog entries: Chrysochromulina strobilus
Original description: Motile cells showing considerable metaboly; dorsi-ventrally flattened, convex on the dorsal surface, flat or concave ventrally; when stationary or gliding slowly body saddle-shaped or appearing truncate-ovate in dorsal or ventral view; when swimming rapidly bell-shaped, obovoid or depressed-globose; 6-10 (exceptionally 5-12) µm in size. Two flagella and one haptonema arising fairly close together from the ventral surface, usually one-third cell length from rounded end in a centre line; flagella subequal to equal, very fine, smooth, tapered to a small knob (E.M. observation), appearing homodynamic when cell moving rapidly and heterodynamic when cell moving slowly or stationary, 2-3 times body length; the haptonema capable of attaching along its whole length, half the thickness of the flagella, 12-18 (exceptionally 20) times the body length when fully extended, with a swollen tip and an internal structure of three concentric membranes surrounding a ring of six 'fibres'. The periplast, pectic in nature, showing a surface pattern of tightly packed angular 'cup' scales 0.15-0.2 µm in diameter; additional very thin, transparent, circular to oval, sculptured scales, 0.3-0.4 µm in diameter, with a pattern of radiating ridges, present beneath the 'cup' scales.
Cells uninucleate, no stigma. Chromatophores faintly striated on outer face, 2 or 4, occasionally 1 or none, golden brown; in cells of motile phase parietal, saucer-shaped to oblong, lacking an external pyrenoid but with a well-marked internal storage region; in non-motile phase pale gold and very finely lobed. Lipids and leucosin produced. Ejectile muciferous bodies small, distributed in peripheral cytoplasm, more numerous on dorsal and ventral surface of back of saddle but their position changing with the metaboly of the body. Nutrition phototrophic and/or phagotrophic. Non-toxic to fish.
In motile phase asexual reproduction by fission into two daughter-cells, usually of equal size; in non-motile phase by successive fission of amoeboid cells to produce 4 ovate daughter-cells with thin walls; motile phase liberated from walled daughter-cell through pore.
Last occurrence (top): Extant. Data source:
First occurrence (base): within No known fossil record modern (0-0Ma, base in "Holocene" stage). Data source:
Leadbeater, B. S. C. & Manton, I. (1969). Chrysochromulina camella sp. nov. and C. cymbium sp. nov., two new relatives of C. strobilus Parke and Manton. Archiv für Mikrobiologie. 68: 116-132. gs Parke, M., Manton, I. & Clarke, B. (1959). Studies on marine flagellates. V. Morphology and microanatomy of Chrysochromulina strobilus sp. nov. Journal of the Marine Biological Association of the United Kingdom. 38: 169-188. gs
Leadbeater, B. S. C. & Manton, I. (1969). Chrysochromulina camella sp. nov. and C. cymbium sp. nov., two new relatives of C. strobilus Parke and Manton. Archiv für Mikrobiologie. 68: 116-132. gs
Parke, M., Manton, I. & Clarke, B. (1959). Studies on marine flagellates. V. Morphology and microanatomy of Chrysochromulina strobilus sp. nov. Journal of the Marine Biological Association of the United Kingdom. 38: 169-188. gs
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