Dear Narjess, 

Cytherina or Cytherella as synonym are not foraminifera but ostracodes genera. This benthic foram may be better identified if you add a lateral view.

Dear colleague,

I wrote Citharina and not Cytherina nor Cytherella!  Citharina is a genus of forams and not ostracodes. Obviously we can not confuse ostracode with foram ! Thank you for your interest.

in my opinion is a Planularia species

Chère Narjess votre Foram. paraît une espèce de Ammoastuta et plus probable A. salsa

Thank you dear colleagues for your answers, It is probably Planularia because Ammoastuta has an agglutinated test whereas Planularia has an hyalin test.

Dear Narjess,

I think it's a Planularia species. I have Planularia complanata in my samples it's similar!!!!!

J'ai juger sur la photo mais puisque tu as le matériel entre tes mains je crois que  oui, Planularia est très fort probable, bonne chance

Thanks Zeineb, would you give me a reference in which I can find a plate and description and check it.

Sorry. It is with out doubt a Planularia rather than Citharina. I am agree with Zaineb. It  is close to Planularia complanata (Reuss). You can see reference of Houlbourn and Moulade 1998: Lower Cretaceous benthic Foraminife assemblages equatorial Atlantic :Biostratigraphy, .... and others

Mascle, J., Lohmann, G.P., and Moullade, M. (Eds.), 1998

Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 159

Dear Karoui-Yaakoub Narjess

I suggest to make an apertural view. 

apparently it is Planularia complanata (Reuss)

Thanks Doctor Sobhi Helal, What document do you consult?  a benthic atlas for example ?...

Hello,

In my opinion a specimen of the photograph belongs to the genus Citharina  – the test is subtriangular in outline, flattened and with truncate margins. Proloculus seem to be globular, wall calcareous. The representatives of the genus Planularia are broadly ovate, strongly compressed and the early stage in a partial coil are similar to genus Astacolus..

Additional information on the estimated age of the sediments in which it is established that specimen would also be useful!

Greetings and good luck!

Daria K. Ivanova

Thank you Dr. Daria, Yes since the beginig I thought that it is Citharia but...I need more reference to compare it with others genera...the estimated age is lower Campanian.

Best regards

Narjess Karoui-Yaakoub

Astacolus genus is triangular in early stage (side view).

 Dear Narjess,

I would advise you to compare all significant characteristics of both Planularia and Citharina before final identification especially if this species is abundant. For full taxonomic description use *Loeblich&Tappan 1988 (I have a scanned copy – if you need).

*Loeblich, A.R., Tappan, H., 1988. Foraminiferal Genera and Their Classification, 2. Van Nostrand Reinhold Company, New York (970 pp. 847 pls.).

Best regards and have a blast time : )

Simona

chère Narjess. Il me semble que l'individu que vous montrez appartient au genre

Saracenaria.

Il présente une carène sur la face dorsale. Il faudrait avoir une vue latérale pour apprécier le profil.

Avec mes salutations

Robert Mathieu

Cher Robert, 

Merci pour votre message et pour votre aide, je tiendrai compte de votre réponse et je vais vérifier l'affiliation générique de cet individu en comparant bien les trois genres...Il est à signaler que ce specimen, présente une carène et il est  de forme applatie.

Mes meilleures salutations

Narjess Karoui-Yaakoub

si le test est vraiment aplati (les deux faces parallèles)  cela fait pencher pour Citharina mais c'est un genre Jurassoque-Cretacé. Dans quel contexte géologique le trouvez vous ? Saracenaria a une section triangulaire (deux faces non parallèles).. à suivre

Merci cher Robert, je l'ai trouvé dans des sédiments d'âge Campanien inférieur.

Dear Karoui-Yaakoub Narjess

Sorry for delay

the attached work may be valuable and also

The basic work of Alfred Leoblich and Helen Tappan

Loeblich, A.R., Tappan, H., 1988. Foraminiferal Genera and Their Classification, 2. Van Nostrand Reinhold Company, New York (970 pp. 847 pls.).

best wishes

Sobhi Helal

Dear Karoui-Yaakoub Narjess 

plz find the attached work and note plate 13

Best Wishes

Sobhi Helal

Many thanks Dr. Sobhi Helel.

All the best

Narjess Karoui