Nannotax3 - ntax_non_cocco - Chrysophyte cysts Nannotax3 - ntax_non_cocco - Chrysophyte cysts

Chrysophyte cysts


Classification: ntax_non_cocco -> Chrysophyte cysts
Sister taxa: Haptophytes, Parmales, Silicoflagellates, Miscellaneous scale-bearing groups, Testate amoebae, Chrysophyte cysts, Dinophytes, Diatoms, Zooplankton groups, Ascidian spicules, Crystals and crud, Palaeozoic nannofossils, hidden

Taxonomy:

Citation: Chrysophyte cysts
taxonomic rank: order
Taxonomic discussion: An important characteristic used to identify members of the class Chrysophyceae is the presence of a siliceous cyst that is formed endogenously. Called statospore, stomatocyst or statocyst, this structure is usually globose and contains a single pore. The surface of mature cysts may be ornamented with different structural elements and are useful to distinguish species. [Wikipedia - Golden Algae page]
The group is predominantly non-marine and the occasional stomatocysts found in marine environments are likely reworked/transported. 

Catalog entries:


Ecology & Biogeography

Predominantly non-marine.

Biology & life-cycles
Bolboforma is a rather similar looking group of fossil (typicaly Miocene) cysts, but they are calcaroeus.

Geological Range:
Last occurrence (top): at top of (100% up, 0Ma, in "Holocene" stage). Data source: Total of ranges of the species in this database
First occurrence (base): within (-Ma, base in "Holocene" stage). Data source: Total of ranges of species in this database

References:

Tanimoto, M., Aizawa, C. & Jordan, R. W. (2003). Assemblages of living microplankton from the subarctic North Pacific and Bering Sea during July-August 1999. Courier Forschungsinstitut Senckenberg. 244: 83-103. gs


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Chrysophyte cysts compiled by Jeremy R. Young viewed: 14-11-2024

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Comments (3)

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About these cysts... I find a LOT of them around the PAP observatory in the NE atlantic in June 2023, in the entire water column (surface and deep samples) (pics here https://plankton.mio.osupytheas.fr/apero-chrysophytes/. We were 3-4 days cruising east off shore, on the Porcupine Abyssal Plain (4000 m bathymetry). The absence of any other land signature such as pollens make me wonder if they were really transported from land ? The simultaneaous presence of what appears to be Synura (a siliceous chrysophyte) as whole cells also makes me wonder whether these organisms could be marine ? But I cannot find a single paper describing them for the ocean, whereas as many exists for land systems (ponds, lake, peats...). Any thoughts ? Maybe when they are carried out to sea they can survive a while in marine environments ? Could they be carried out with dust aerosols ?

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Hi, thank you for your comments. I am no expert on these but my assumption has been that these cysts are resistant and get transported into the marine realm. I have found them from time to time, but never in abundance and mostly in shelf waters.

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This is Archaeomonas cysts (Chrysophyceae), known from Miocene sediments of Paratethys (Hajos M., 1968).