Nannotax - forum

So, the idea here is that we can use the commenting tools to discuss anything about the site or coccolithophores. If discussions get long we can split the page into different topics. If no-one says anything we may quietly remove the page.

However, we will read every comment posted here so feel free to use this for:

How to add comments

If you scroll down to the bottom of the page you will find a heading "Add Comment" and a form to fill in. To reply to a comment click the curvedarrow symbol below and to the right of it. The same layout is there on every taxon page. For a bit more advice you can see the guidelines.

Comments (42)

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Damini Soni (Gujarat, India)

Please share email of concerned person dealing with information security team or vulnerabilities report. A potential security threat has been found. Regards.

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Ian (Coventry, UK)

Hi

We're looking at samples of freshwater collected for us by school groups, we're actually looking for viruses under TEM but we as hard pellet ( 200K RCF ) after a 6 micron filter we get everything and we're pulling out a lot of what look like coccoliths. I can't find much information on fresh water species but we have structures resembling Palusphaera and others. Are there any resources about fresh water species?

cheers

Ian

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Jeremy Young (Tonbridge, UK)

Ian

Thanks for posting that image. Those are not coccoliths but non-calcified scales. Actually quite a few different protists use scales to form composite exoskeletons and these are variously formed of resistant organics, silica or calcite (coccoliths). I am not an expert on these groups but I think your images are of Paraphysomonas and if you do a google search on that it should get results. i would like to have more images of these sort of things in the non-coco section, so if you could send me some images that would be appreciated.

cheers Jeremy

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Ian (coventry, UK)

thanks! That's really useful information. I'll sort some images out for you - might take a while as we have around a thousand frames to go through. We also have map refs and some basic water quality info for each collection site. Drop me an email and I'll send them as zipped download links. The actual project is here - http://www.warwick.ac.uk/virushunters

cheers

Ian

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Chengxu Zhou (China)

Dear Professor Young,

I am working on several strains of the species of genus Pleurochrysis (I found the name has been changed to Chrysotila). These strains were isolated from aquaculture pool and bloomed in shrimp pools. The bloom did harm to the organisms. However, I am not quite sure what the exact name of the species is. Could I email you some of the SEM pictures and please help me to identify the species?

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Jeremy Young (Tonbridge, UK)

Dear Chengxu Zhou

Thank you for sending those images (I have unblocked the upload of them). I think they are, C. pseudoroscoffensis, but I am not an expert on this group of coccolithophores. You might like to try to contact Ian Probert of Roscoff Marine Lab in France.

Jeremy

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Chengxu Zhou

Dear Dr.Young,

Thank you very much for your reply. I will try to contact Dr.Probert.

Chengxu

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Chengxu Zhou

Dear Dr. Young,

Thank you very much!

Chengxu

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fatemeh (mashhad, Iran)

Dear Prof. J.Young

Is it possible to place about "ascidian spicules" or other calcareous nannofossil-liked forms in this site(especially for Jurassic system)?

Regards.

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Jeremy Young (Tonbridge, UK)

Hi there is some information on ascidian spicules in the "Other Groups" area - see this page http://http://www.mikrotax.org/Nannotax3/index.php?id=20011 - Jeremy

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Shaka (Oslo, Norway)

Hi,

I'd like to use one of the images of coccolithophores (File name: JRYSEM-207-21a.JPG) for my PhD thesis. Based on the provided info in the "citation&copy right" section of this website, I must ask for permission for the works with publication potential.

Could you grant me such a permission? and if your answer is affirmative, please send me the right reference detail for citation.

Many thanks,

Shaka

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Jeremy Young (Tonbridge, UK)

I have answered this directly, but for the record this use is fine. In vernal you should include attribution along the lines of image from nannotax website (www.mikrotax.org/Nannotax3 image JRYSEM-207-21a.JPG), if the image is being used to illustrate a taxonomic concept (as opposed to just as generic picture of a coccolith) then you should also check the filename and the image metadata (the text below the image when you click to enlarge it) and record the source of the image.

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Jeremy Young (UK)

June 2018 - upgrade of Neogene content.

Jim Bergen, Eric de Kaenel and colleagues published a set of five major papers on Neogene and Oligocene nannofossils at the end of 2017 in the JNR. These were based on a 15 year research project to develop the BP Neogene Stratigraphic Framework, integrating results from the Gulf of Mexico and Ceara Rise ODP site 154. This included revision of numerous species, > 1000 new high quality colour light micrographs, a wealth of new stratigraphic range data and description of ca 65 new species. This is the most important work on Neogene nannofossil for at least the last twenty years. Incorporating the results into Nannotax has required a major effort - and a lot of adjustment is still needed. The most affected parts are the sections on Discoaster, Helicospheara and Sphenolithus.

Please feel free to add comments - especially where you disagree with the species concepts or how they have been presented here. Jeremy

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Siti Umiyatun Choiriah (Yogyakarta, Indonesia)

Dear Prof. J.Young

I will conduct a study on the Paleoclimate Quaternary (Pleistocene-Holocene) Glacial-Interglacial at North East Java Basin, Indonesia.

But I am still confused. Is Climate Change at Quarternary can be recorded on the development and variation Nannoplankton Species?

What Nannoplankton species can be used for the cold Climate founders especially that developed in the Quaternary Period.

That is all and thank you

Umiyatun Choiriah

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Jeremy Young (UK)

Siti

This site is not really the place for this type of question - the coccoliths listserver would be a better choice. However, this is not a straightforward question. Nannofossils evolved fast in the Quaternary and as a result they are not as easy to use for paleoceanography as we might hope. There are exceptions, for instance Florisphaera profunda is an excellent paleoproductivity indicator, but you may not get very strong glacial-interglacial contrasts and should combine your data wiith other proxies.

Jeremy

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fatemeh (Mashhad, Iran)

Hi dear prof. Young

I'd like to know if it's possible to add another option for sorting genera and spices by image based on their lateral view too?

Regards.

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Jeremy Young (UK)

Fatemeh -we can't really do that but you can select for basic shape placolith vs murolith vs planolith, for forms with a spine, for high or low rims etc. The system is a bit compplex but if you experiemnt you should be able to do most types of search you want.

Jeremy

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kamran (Beijing, China)

what's a difference between the Paleocene Eocene Thermal maximum and Eocene thermal maximum? can we deal both phenomenons as same single process?

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Jeremy Young (UK)

Kamran - the Paleocene Eocene Thermal Maximum (PETM) is a short interval of elevated paleotemperatures at the Paleocene -Eocene boundary - you can find out much more about it easily with a google search. The term Eocene Thermal Maximum is not conventionally used but the term (Early) Eocene Thermal optimum is used for the extended period of maximum temperatures in the Early Eocene.

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Jeremy Young (UK)

Tags, Metrics and Advanced Search - for INA16 in Athens we have launched a major upgrade to the site. All cenozoic taxa have been reviewed and data added in terms of a set of 'tags' for morphological characters and 'metrics' (coccolith and coccosphere size, liths per sphere, elements per lith). This data has been applied systematically and can be used to from the Advanced Search page (Tools Menu) to aid identification. The system is a bit complex so do read the explanatory page (About Nannotax menu).

Jeremy

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Jeremy Young (UK)

Revised recent comments page I have just now revised the recent comments page so that it shows replies below the original comments. This should make it easier to see how comments are addressed (and in some cases has resulted in us finding comments we had not answered)

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Ovie Collins (Lagos, Nigeria)

Great! I found this site. Grateful to the Organizers.

I sometimes have difficulty identifying these Nannofossils forms on Light microscope, because some of them looks alike.

Please I also wish to know the BEST method for preparing Nannofossils Slide for enhanced recovery.

Lastly at what temperature should these slides be dried using the Electrical Hotplate.

Regards

Ovie Collins

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Jeremy Young (UK)

Methods - there is a useful overview of methods in Bown (1998) Calcareous nannofossil biostratigraphy. For drying slides it is best to use a fairly low temperature (around 60°C), as you do not want to boil the water.

Best way to enhance recovery? that depends on the sample but the best technique to start with is almost always to do a direct smear (i.e. mix a little sediment in a drop of water on slide and then smear it over the slide with a toothpick). Then having seen what is in the rock you can try experimenting with how to improve recovery - but for most routine work we just use smear slides.

LM identification - they are not always easy, but as you study them you will learn more.

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Kurosh (Mashhad, Iran)

hi my dear friend

please introduce me a reference or definition for sister,daughter and other terms relate them?

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Jeremy Young

Kurosh

We are using these terms as indicators of relative taxonomic position. So for example all the species inside a genus can be described as daughter taxa of that genus and they are sisters of each other. The whole database is organised hierarchically so it is quite convenient to use these sort of terms.

Jeremy

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Kurosh (Mashhad, Iran)

hi prof

I`m also as my teacher

That's great,thanks.

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Kurosh (Mashhad, Iran)

hi again prof

And what a bout daughter and granddaughter?

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Jeremy Young

Kurosh

Sorry if this is confusing - there is nothing really ver technical about this we are just using the terms to indicate relative position in the classification, as used on the site. So if we consider the family Rhabdospheraecae its daughter taxa are are all the genera within it -Acanthoica, Algirosphara etc. and its granddaughter taxa are all the species within it - Acanthoica acanthifera, Acanthoica acanthos etc.

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Jeremy Young (UCL, UK)
Update to range plots - I have now changed the way range data is plotted on species pages, the histograms still show the data from the Neptune database but the nannotax range is now directly compared to it. Also the background image shows the stages using GTS colours (hover mouse over the plot to see stage names).
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fatemeh (Iran)
hi
That's great,thanks.
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fatemeh (Iran)
Hi
Is there any Channel about calcareous nannofossils in telegram or other social networks?
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Jeremy Young (UCL, UK)
I don't think so - probably the closest is the INA Facebook pagehttps://www.facebook.com/INA.education"""
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Masykur Widhiyatmoko (Geological Research and development Cent, Indonesia)
Hi, I am new in learning nannoplankton from Geological Research and Development Centre, Geological Agency, Indonesia...
Many thanks to all contributor of this website.

Thaks,

Masykur
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