Hi

I think that it could be Cibicides sp.

Regards

G.

Hello,

It looks like a Gyroidina or Gyroidinoides sp.

Good luck.

I would say that is a Cibicidoides sp. May I ask where is it from?

Ammonia sp.

see the variability at www.foraminifera.eu/querydb.php?genus=Ammonia&revby=identified+by+scientist&aktion=suche

It looks to me like Ammonia beccarii, but the umbilical area has become infilled with sediment obscuring the characteristic features.  Otherwise it is very close to A. becarrii.  See here for images...

https://www.google.co.uk/search?q=ammonia+beccarii&biw=1567&bih=1023&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjc9Ief88PPAhXMlx4KHcIYAzIQsAQIKQ

This is a very common Recent-Holocene species.  I hope this helps.

I don't see the aperture extending onto the dorsal side, so not Cibicides or Cibicidoides.  Nor do I see the umbilical plug of Ammonia.  I do see apertural flaps extending into the umbilicus.  So, I would call it Valvulineria, though I do not know which species. 

For me it looks like Ammonia beccarii.

Though some distinguishing taxonomic characters are not observable on the picture, for me it is clearly some sort of Ammonia beccarrii ecophenotypic variation based on how the shell reflect the light of the microscope, and the sutures on the spiral side.

I'll be conservative and say Ammonia sp or check Eponides sp

http://www.marinespecies.org/foraminifera/aphia.php?p=image&pic=36815

For those who say Ammonia, is there anything comparable in Hayward et al. (2004: Morphological distinction of molecular types in Ammonia – towards a taxonomic revision of the world’s most commonly misidentified foraminifera; Marine Micropaleontology 50, 237-271)? 

Dear Kader

According to the standard taxonomic characteristics of Ammonia beccarii (Linné, 1758). your sample is similar to the mention taxon. of course the septal form and number of chamber is not completely correspond with Holotype. But the mentioned factor is sometimes affected by local ecological condition. However I believe this taxon can be assigned to Ammonia beccarii (Linné, 1758).

You can check link below:

link 1: http://www.foraminifera.eu/ammonia.php

link 2: http://www.marinespecies.org/aphia.php?p=taxdetails&id=112849

Regards

Massih

I think that it is ammonia beccarii, I found it in pleistocene samples from Tunisia...it has a good paleoecological indications.

Best

Narjess

It looks very similar to Aubignyna perlucida from the Italian coasts. Iwould say some Aubignyna species. See Loeblich and Tappan 1987 plate 726

Hello!

For me is Ammonia beccarii.

Regards. 

 Hello Kader, 

Could you please give more information about where the sample come from? like sediment core, if so the potential age of of the sample or sediment surface and  water depths of the sample etc. 

I personally do not think it is Ammonia sp. but the images also do not provide significant amount of information. it seems like the aperture is some type of slit without a visible lip (?) that is just an example of problems of single images.

I would  recommend you to check the genus Cibicides, Gyroidina/Gyroidinoides. depending on the aperture etc.

Best,

Zeynep   

Hi Kader,

I am familiar with your species. I observed it in West-African samples mostly of Eocene age. Sometimes it occurred in nearly monospecific assemblage in mass quantities. Characteristic features are limbate sutures at spiral side and wall pores. I tentatively named it as Gavelinella ex gr. beninensis De Klasz et al., 1969. It is very probably not Gavelinella and also Ammonia, Aubignyana etc. I am not sure about genus up to now.

Good luck, Miroslav

Ammonia coexists with genres like Elphidium sp., in trancitional enviroments, but very hard with Acarina pentacamerata or another planktonic foraminifera. The specimen lacks the structures of the ventral sutures and forced to occasionally observed.

Possibly, it is ammonia beccarii,

sure it's belong to Foraminifera . please tell me where did you find it? at wich depth and area? 

even i need to see the section ofthe shell but i suggest 

Ammonia beccari

and

Elphidium sp.

the pics of these 2  species are attached as well

Look like a Valvulineria to me (e.g. V. glabra, with similar 'fins' in the middle)

http://palaeo-electronica.org/content/images/444/figure28.jpg (specimen 22)