[coccoliths] Help with microfossil identification

Thu Mar 4 17:07:54 -03 2021

Thanks to all for the information, papers and discussion.
The sample came form an outcrop near a river in Tierra del Fuego Island.
So, according to what you all said, it most probable that the Thecamebans
are contaminated. Still, it is weird since I prepared a little fresh piece
of the sample and smashed it in the mortar. It shouldn't be contaminated.
The entire sample was fresh and collected digging in the outcrop. It was
clean, no dirt...
Cheers,
Juan

Dr. Juan Pablo Pérez Panera
CONICET
División Paleozoología Invertebrados,
Museo de La Plata, FCNyM, UNLP
Paseo del Bosque s/n, 1900, La Plata
Buenos Aires, Argentina
perezpanera at gmail.com

El mié, 3 de mar. de 2021 a la(s) 12:24, doc. RNDr. Katarína Holcová, CSc. (
katarina.holcova at natur.cuni.cz) escribió:

> Continental. There are extremely rare in Eocene based on my knowledge
>
> Katarina
>
> st 3. 3. 2021 v 14:12 odesílatel Juan Pablo Perez Panera <
> perezpanera at gmail.com> napsal:
>
>> I found it in Middle Eocene siltstones. Marine paleoenvironment around
>> 150 meters depth according to planktic forams relative abundance, but it
>> also has high number of continental palynomorphs. Are those tecamebas
>> continental or marine? And also, are there records of them in the Eocene?
>> Cheers,
>> Juan
>>
>> El mié., 3 de mar. de 2021 06:22, Buckman, James O <J.Buckman at hw.ac.uk>
>> escribió:
>>
>>> No problem.  What was the depositional setting of this material and the
>>> sediment type?
>>>
>>>
>>>
>>> Jim
>>>
>>>
>>>
>>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
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>>>
>>>
>>> *From: *Juan Pablo Perez Panera <perezpanera at gmail.com>
>>> *Sent: *02 March 2021 11:24
>>> *To: *Mailing list for INA members and other scientists working with
>>> living or fossil nannoplankton <coccoliths at fcnym.unlp.edu.ar>
>>> *Cc: *Buckman, Jim O <J.Buckman at hw.ac.uk>
>>> *Subject: *Re: [coccoliths] Help with microfossil identification
>>>
>>>
>>>
>>>
>>> ***************************************************************** *
>>> *Caution: This email originated from a sender outside Heriot-Watt
>>> University. Do not follow links or open attachments if you doubt the
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>>>
>>>
>>> Nice. Thanks a lot. And many thanks to Jim!
>>>
>>>
>>>
>>> El mar., 2 de mar. de 2021 05:31, Poulton, Alex <A.Poulton at hw.ac.uk>
>>> escribió:
>>>
>>> Hi. I spoke to Jim Buckman (copied in here) who is working on this group
>>> – he suggest its Tracheleuglypha, possibly T. acolla.
>>>
>>> Best wishes, Alex
>>>
>>>
>>>
>>> *From:* Coccoliths <coccoliths-bounces at fcnym.unlp.edu.ar> *On Behalf Of
>>> *Juan Pablo Perez Panera
>>> *Sent:* 02 March 2021 03:22
>>> *To:* Mailing list for INA members and other scientists working with
>>> living or fossil nannoplankton <coccoliths at fcnym.unlp.edu.ar>
>>> *Subject:* Re: [coccoliths] Help with microfossil identification
>>>
>>>
>>>
>>>
>>> ***************************************************************** *
>>> *Caution: This email originated from a sender outside Heriot-Watt
>>> University. Do not follow links or open attachments if you doubt the
>>> authenticity of the sender or the content. *
>>> * *****************************************************************
>>>
>>>
>>>
>>> Hi Katarina,
>>>
>>> I googled it and you are rigth!
>>>
>>> Thanks!
>>>
>>>
>>>
>>> El lun., 1 de mar. de 2021 17:51, doc. RNDr. Katarína Holcová, CSc. <
>>> katarina.holcova at natur.cuni.cz> escribió:
>>>
>>> It looks like  euglyphids (testate amoebae). In this case, plates are
>>> siliceous
>>>
>>>
>>>
>>> Katarina
>>>
>>>
>>>
>>> po 1. 3. 2021 v 20:53 odesílatel Juan Pablo Perez Panera <
>>> perezpanera at gmail.com> napsal:
>>>
>>> Hi all,
>>>
>>>
>>>
>>> Does anyone have any idea what this could be?
>>>
>>> I found them at the SEM in samples from the middle Eocene (Lutetian) of
>>> Austral Basin (Argentina). It seems that it is not birefringent as I didn't
>>> see them at the OM.
>>>
>>>
>>>
>>> Cheers,
>>>
>>> Juan
>>>
>>>
>>>
>>> Dr. Juan Pablo Pérez Panera
>>>
>>> CONICET
>>>
>>> División Paleozoología Invertebrados,
>>>
>>> Museo de La Plata, FCNyM, UNLP
>>>
>>> Paseo del Bosque s/n, 1900, La Plata
>>>
>>> Buenos Aires, Argentina
>>>
>>> perezpanera at gmail.com
>>>
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>>>
>>>
>>> --
>>>
>>> doc. RNDr. Katarína Holcová, CSc.
>>> Tel.: +420 221 95 1460
>>> E-mail: katarina.holcova at natur.cuni.cz
>>>
>>> Komise garantů studijních oborů a programů; Ústav geologie a
>>> paleontologie
>>> Univerzita Karlova v Praze
>>> Přírodovědecká fakulta
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>>>
>>> Committee of Chairs for Study Fields and Programs; Institute of Geology
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>
>
> --
> doc. RNDr. Katarína Holcová, CSc.
> Tel.: +420 221 95 1460
> E-mail: katarina.holcova at natur.cuni.cz
>
> Komise garantů studijních oborů a programů; Ústav geologie a paleontologie
> Univerzita Karlova v Praze
> Přírodovědecká fakulta
> Albertov 6, 128 43 Praha 2
> www.natur.cuni.cz
>
> Committee of Chairs for Study Fields and Programs; Institute of Geology
> and Paleontology
> Charles University in Prague
> Faculty of Science
> Albertov 6, 128 43 Praha 2
> www.natur.cuni.cz/en
> _______________________________________________
> Coccoliths mailing list
> Coccoliths at fcnym.unlp.edu.ar
> https://webmail.fcnym.unlp.edu.ar/mailman/listinfo/coccoliths
>
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