Nannotax3 - ntax_cenozoic - Isochrysis


Classification: ntax_cenozoic -> Isochrysidales -> Isochrysidaceae -> Isochrysis
Sister taxa: Dicrateria, Isochrysis, Ruttnera, Tisochrysis

Daughter taxa (time control age-window is: 0-800Ma)
Isochrysis galbana
Dominant stage motile, ellipsoidal, cells with two types of body scale
Isochrysis litoralis
Dominant stage non-motile, one type of body scales
Isochrysis maritima

Isochrysis nuda
Dominant stage non-motile, without body scales


Citation: Isochrysis Parke 1949
Rank: Genus
Type species:

Original description: Cellula solitaria, natante, nuda, periplasto differentiae carente praedita; •ellipsoidi, ad anteriorem partem truncata, ad posteriorem rotundata; dorsi- ventraliter paulum depressa; quae transverse secta formam praebet ovatam; forma mutabili; 2 flagellis, longitudine paribus, ad anteriorem partem ex- sistentibus; 2 chromatophoris magnis lateralibus fulvis; ocello parvo; nucleo parvo mediano; desunt vacuola; cellula pabulum holophytica; nee oleo nee leucosino indigente; sine sexu propagatur fissione in longitudinem effecta per gradus mobiles immobilesque; cysto intra cellulam confecto; cystis sphaeroidibus cum membrana externa paulum sculpta; non deest multiplicationis genus palmelloidem per gradum effectae.

Farinacci & Howe catalog pages: Isochrysis



Search data:
Lith size: 0->0┬Ám;
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: Total of range of species in this database
First occurrence (base): at top of No known fossil record modern (100% up, 0Ma, in "Holocene" stage). Data source: Total of range of species in this database

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

Jordan, R. W., Cros, L. & Young, J. R. (2004). A revised classification scheme for living Haptophytes. Micropaleontology. 50(supplement 1): 55-79. gs

Parke, M. (1949). Studies on marine flagellates. Journal of the Marine Biological Association of the United Kingdom. 28: 255-288. gs


Isochrysis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 27-9-2022

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

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