Chrysochromulina alifera

Taxonomy:

Catalog entries: Chrysochromulina alifera

Original description: Motile cells showing extreme metaboly, approximately saddle-shaped with large lateral curved wings when moving slowly or stationary; bell-shaped, oblong, ovoid or spheroidal when swimming rapidly; 6-10 (exceptionally 4-12) µm in length of back of saddle. Two flagella and one haptonema arising close together from ventral concave surface near to one margin in a centre line; flagella smooth, of equal length or subequal, gradually attenuated to a hair point (E. M. observation), usually heterodynamic, occasionally appearing homodynamic, 2-2½ times cell size in length; the haptonema thinner than the flagella, 10 to 12 (exceptionally 14) times body size in length when fully extended, with a swollen tip but no obvious translucent sheath visible under the electron microscope. The periplast, pectic in nature, showing a covering of very thin transparent circular to oval sculptured, dimorphic scales, visible only under the electron microscope; scales without spines 0.25 to 0.45 µ, sculpturing similar to those of C. ephippium; scales with spines 0.28 to 0.45 µ, the spine slightly less than scale diameter in length attached centrally by 2-4 short decurrent ridges not extending to the margin. Distribution of the two types of scales on body unknown.

Cells uninucleate, no stigma. Chromatophores striated, 2 or 4,occasionally one or none, intense golden brown; in cells of motile phase saucer-shaped to square or oblong, with single inconspicuous globular body (pyrenoid?) placed near the margin towards the non-flagellar end; in non-motile phase finely lobed. Oil and leucosin produced. Ejectile muciferous bodies small, localized in groups mainly towards the non-flagellar end of the cell. Nutrition phototrophic and/or phagotrophic. Not toxic to fish.

In motile phase asexual reproduction by fission into two daughter-cells of equal or unequal size; in non-motile phase by successive fission of amoeboid cells to produce 4 ovate daughter-cells with exceptionally thin walls; motile phase probably liberated from walled daughter-cells through a pore.

Geological Range:
Last occurrence (top): Extant. Data source:
First occurrence (base): within No known fossil record modern (0-0Ma, base in "Holocene" stage). Data source:

Chrysochromulina alifera compiled by Jeremy R. Young viewed: 8-12-2023 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20081 Go to Archive.is to create a permanent copy of this page - citation notes

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