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:
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?
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.
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
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?
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© 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.
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.
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
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
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.
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.
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).
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.
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.
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.
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.