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:
I am a sculpture and I have been commissioned by Chinnor Parish Council to make a sculpture that celebrates Chinnor Quarry (South Oxfordshire, UK) which, as I am sure you know, is a large chalk and marl quarry. I have been researching the geology of the site and I am amazed at what I have learned regarding coccoliths and the nature of chalk formation. I am writing to ask if anyone can help with advising on 3D computer models of coccoliths and also further information on how they from the plates and why they are the shape and size they are. I am considering making a number of large coccoliths and any help would be greatly appreciated. Thanks, Matt.
You are exactly right. The issue is related to the browser used on my Windows-based laptop. The machine uses Microsoft Edge. It has handled Nannotax fine until very recently, so there must have been an update. My Mac laptop (using a different browser) continues to handle Nannotax perfectly well. Anyway, the issue is definitely browser-related.
Thanks again for your help.
I cant't see any problem from my end but it may be an incompatiblity related to your set-up. Have you tested with a different browser or on another computer? If you do find there is a persisitent problem with a specific set-up do let me know as usually there are solutions possible from the developer end. Alterntively if it is being consistently slow in your location then it would be useful to know that as well
I found your site is GREAT! Very well organized and therefore very useful, especially because I was very recently editing a manuscript on nannofossils for Carnets Geol. https://doi.org/10.2110/carnets.2022.2217
I have few suggestions/comments.
1) For instance, in your reference list, it happens that papers by a single author follow multiauthored papers by the same first author (they should precede them)
2) You consider that nobiliary particles are part of the author's family name. There should not: van Hinte should be cited as Hinte and listed in the reference under the letter H
(but another Van Hinte with a first capital letter should be listed under the letter V; de Jong as Jong, under J, not under D; ... d'Orbigny as Orbigny, under O, not under D.
All best wishes,
Thank you for the appreciation and for the link to the paper - Bernard Lambert's work is always interesting to see and I will certainly add that to the bibliography. I had not really noticed the reference sorting problem but it was easy to fix, thank you for pointing it out. Honorific prefixies are more problematic since opinions vary on how to handle them, but maybe it is time to go back and tidy them up.
The Farinacci catalogue lists 3 species under the genus Pharus Wind & Wise. As I understand it, this genus falls within the informal concept of "algae", and its nomenclature is therefore covered by the International Code of Nomenclature for algae, fungi, and plants, current edition 2018. This means that the genus name Pharus Wind & Wise is illegitimate, as it is a later homonym of Pharus P.Browne, a genus of neotropical grasses, name published in 1756. I am trying to get this message to somebody active in nannofossil research so that a valid replacement name can be published.
Dear Keith Edkins
Thank you for your comment. Pharus Wind & Wise 1977 is indeed an alga and so a junior homonym of Pharus Browne 1756. The taxonomy of this group of Late Cretaceous holococcoliths is problematic but there is no other obvious genus for the species so a new name shoudl be propesed. I believe you have been in touch with Dr Jackie Lees and she would be an ideal person to collaborate on this.
Good question - I do indeed need to update the site to use GTS2020. Doing so is a bit of a project though, and I have just not found the time to do it yet. For the most prt though the difference between GTS2020 and 2012 are small in our time interval - the big changes are in the Palaeozoic. Thank you for reminding me though, it is something Ineed to do.
all the best
I have an identification quizz for you all. I found this in the subtropical Pacific Ocean (near Tonga volcano ridge) in a sediment trap moored at -170 m. It looks like calcite and was found in a sample with a large amount of coccolithophores (at least 25 different species). I was wondering whether this perfect ice cream cone could be a coccolith or something that you already stumbled upon ? Thanks a lot for your help ! Cheers.
That is definitely not a coccolith but it certainly is nice. I agree it looks calcareous and I suspect it might be the proloculus (first chamber) of a very small foram - it has both a terminal aperture and pores on the shell. There are some microfossil groups on facebok which might help with an identification.
I don't know if this was a mistake. I think the fourth (otherwise of excellent quality) picture placed under Hayesites irregularis (named KCooper-Rucinolithus irregularis.jpg) in the nannotax website probably is more compatible with the description of Hayesites albiensis. The specimen appering in this picture has a marked stellate and regular outline having only six long rays.
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