Isochrysis nuda

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


Citation: Isochrysis nuda Bendif & Probert, in Bendif et al. 2013
Rank: Species

Distinguishing features: Dominant stage non-motile, without body scales

Original description: Cells solitary, non-motile, spherical (3.5–6 µm in diameter), without scales. Flagella two, slightly unequal (7.5–9 µm) inserted apically with abbreviated haptonema (100 nm) between; latter with three to four microtubules in the emergent part. Plastid single, parietal, yellow-brown with immersed pyrenoid. Asexual reproduction by division in motile stages. Nucleotide sequences of nuclear SSU and LSU rDNA and cox1 gene are distinctive. Substitutions in nuclear SSU rDNA sequence at positions 216 (C/T), 706 (T/C), 1329 (C/T), 1348 (T/C), 1667 (T/C) and 1668 (C/T) are diagnostic compared to other species members of Isochrysis.

Type images:

Farinacci & Howe catalog pages: Isochrysis nuda

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:
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source:

Plot of occurrence data:


Bendif, E. M., Probert, I, Schroeder, D. C. & de Vargas, C. (2013b). On the description of Tisochrysis lutea gen. nov. sp. nov. and Isochrysis nuda sp. nov. in the Isochrysidales, and the transfer of Dicrateria to the Prymnesiales (Haptophyta). Journal of Applied Phycology. 25: 1763-1776. gs


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

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