Nannotax3 - ntax_Farinacci - Chrysochromulina strobilus

CATALOG - Chrysochromulina strobilus

Folder trail: ntax_Farinacci -> Haptophytes -> Chrysochromulina -> Chrysochromulina strobilus
Folders this level: << < C. pachycylindra, C. papillata, C. parkeae, C. parva, C. pelagica, C. planisquama, C. polylepis, C. pontica, C. pringsheimii, C. pseudolanceolata, C. pyramidosa, C. quadrikonta, C. rotalis, C. scutellum, C. simplex, C. strobilus, C. tenuispina, C. tenuisquama, C. throndsenii, C. vexillifera

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.
Taxa are sorted alphabetically for simple browsing, or you can use search boxes at the top & bottom of the page

Current identification/main database link: Chrysochromulina strobilus Parke and Manton in Parke et al. 1959

Compiled data

Citation: Chrysochromulina strobilus Parke and Manton in Parke et al. 1959
Rank: Species
Type specimens: Type culture (Plymouth no. 43) deposited with the Culture Collection of Algae and Protozoa, Cambridge.
Standardised type level: 160_HOLOCENE
Type locality: The sea at position lat. N. 49 21', long. W. 04° 54' (9 May 1950, type culture) at surface.
Farinacci catalog page (& compiler): n/a
Current citation: Chrysochromulina strobilus Parke and Manton in Parke et al. 1959

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.


Greek: strobilos —a pirouette

Extra details from original publication

The scales
Fig. 44, PL VIII (for explanatory diagram see Fig. 13), shows a section of scales in position on the body at a magnification comparable to that of the adjacent haptonema sections (i.e. 60,000 as in Figs. 42 and 43).The cup-shaped scales with conical thickened base are arranged in a very regular layer, as was to be expected from the external view. Beneath them are the plate scales, also in a single layer; each is a very delicate sheet with a slight central thickening and a rim projecting up from both surfaces like the edge of a coin. Other less highly magnified sections showing the scales still in position on the cell are contained in PI. Ill and elsewhere.

Detached scales, still arranged in sheets, are common. Two such sheets, one inverted with respect to the other, are situated near the letter S on Fig. 30, PI. IV. Neither can be directly related to the adjacent cell since the sheet nearest to the body surface is upside down with respect to it. When cut transversely the conical cup-scales, arranged side by side, produce an effect as of a delicate zig-zag line at this low power. The amorphous material partially investing the scales on dried material is no longer visible in sections but this is likely to be due to solution in the methacrylate since the regular array of scales in each sheet is undisturbed. This can be seen no less clearly when a sheet is cut tangentially as in the top corner (right) of Fig. 32, PI. V. In such an aspect the scales appear circular with a central opaque area; there is again no sign of intercalary material between them but they are in exactly the same serial arrangement as in Fig. 25, PI. II.

Beneath the scales is a membrane, as in C. chiton and sometimes though not always a layer or layers of small vesicles. The diameter of these vesicles is of the same order as that of the scales. Since there were no superficial vesiclesin C. chiton as small as this we may perhaps find this fact to be significant when developmental processes can be more seriously considered.

Editors' Notes


Leadbeater, B. S. C. & Manton, I. (1969a). 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


Chrysochromulina strobilus: Catalog entry compiled by Jeremy Young. Viewed: 30-11-2022

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