Isochrysis litoralis

Classification: ntax_cenozoic -> Isochrysidales -> Isochrysidaceae -> Isochrysis -> Isochrysis litoralis
Sister taxa: I. galbana, I. litoralis, I. maritima, I. nuda


Citation: Isochrysis litoralis Billard & Gayral 1972
Rank: Species

Distinguishing features: Dominant stage non-motile, one type of body scales

Original description: Young cells non-motile, hemispherical (4-6 x 6-8 µm) or round (5µm); older cells spherical varying in size (5-15µm) with thick pectic envelopes not easily penetrated by stains. Two parietal golden-yellow chromatophores with one intraplastidial pyrenoid per chromatophore. Asexual reproduction by division of the non-motile cells and by production of elongated swarmers (4 x 7µm) with two apical subequal (7-8 and 8-9µm) homodynamic flagella. Swimming movements similar to those of Isochrysis maritima. Cells covered with one layer of oval plate scales (0.3 x 0.18µm) with a thickened margin and radiating ridges.

Type images:

Farinacci & Howe catalog pages: Isochrysis litoralis

Cultures: strains of this species are maintained in culture, for details see Roscoff culture collection.

Search data:
MetricsLith size: 0->0µm;
Data source notes: RCC
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant Data source: present in the plankton
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: [JRY]

Plot of occurrence data:


Billard, C. & Gayral, P. (1972). Two new species of Isochrysis with remarks on the genus Ruttnera. British Phycological Journal. 7(289-297): -. gs V O


Isochrysis litoralis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-4-2021

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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