Nannotax3 - ntax_non_cocco - Dicrateria rotunda Nannotax3 - ntax_non_cocco - Dicrateria rotunda

Dicrateria rotunda


Classification: ntax_non_cocco -> Haptophytes -> Prymnesiales -> Prymnesiaceae -> Dicrateria -> Dicrateria rotunda
Sister taxa: D. inornata, D. rotunda, D. sp.

Distinguishing features:
Parent taxon (Dicrateria):
This taxon: Bears two types of plate-like scales, with sparse radial ribs

Taxonomy:

Citation: Dicrateria rotunda (Reynolds 1974) Probert & Bendif, in Bendif et al. 2013
Taxonomic rank: species
Basionym: Imantonia rotunda Reynolds 1974

Catalog entries: Imantonia rotunda

Distinguishing features:
Parent taxon (Dicrateria):
This taxon: Bears two types of plate-like scales, with sparse radial ribs

Original description: Cells motile, more or less spherical, 3-4 µm in diameter, not metabolic. Flagella two, smooth, homodynamic, 1-1½ cell diameters in length; haptonema not found. Two golden-brown parietal chloroplasts in younger cells, sometimes four or five in older cells, with embedded pyrenoids. Cell body bearing circular scales with coarse radial fibrils on their proximal faces; diameter approximately 0.5 µm

Type images:


Morphology:

Cell spherical; Flagella equal, haptonema absent; Scales plate-like (2 types) with radial ribs (few) some concentric ribs; Pyrenoids immersed, traversed by thylakoids (Edvardsen et al. 2011)


Cultures: Strains of this species are maintained in culture, for details see Roscoff Culture Collection.

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:

References:

Green, J. C. & Hori, T. (1986). The ultrastructure of the flagellar root system of Imantonia rotunda Prymnesiophyceae. British Phycological Journal. 21: 5-18. gs

Green, J. C. & Pienaar, R. N. (1977). The taxonomy of the order Isochrysidales (Prymnesiophyceae) with special reference to the genera Isochrysis Parke, Dicrateria Parke and Imantonia Reynolds. Journal of the Marine Biological Association of the United Kingdom. 57: 7-17. gs

Reynolds, N. (1974). Imantonia rotunda gen. et sp. nov., a new member of the Haptophyceae. British Phycological Journal. 9: 429-434. gs


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Dicrateria rotunda compiled by Jeremy R. Young viewed: 16-5-2025

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