AbduRazzak called this as Incertae sedis. From Wadi Musawa section, Jabal Ja'alan area,S E Oman.Middle Eocene.T hreev iews of sames pecimenx, 65.
Descyiption: External: Test cone shape with circular to slightly convex base. There are 14-18 triangular chambers arranged alternatively and divided by thick sutures orsepta.T he aperturei s roundeda nd surroundedb y a thick lip locateda t the top of the cone.
Axial section: Small sized glassy tube-like narrowing towards the top and infilled
with calcite. Periphery round slightly lobate. Sutures are straight. Aperture rounded raiseda nd su, rroundedw ith two lips.
Equatorial section: Rounded plate-like shape, divided into four triangular chambers.Periphery rounded with a thick margin.
Dear colleague,
The gross morphology of your microfossils reminds me of Bolboformids (microfossils incertae sedis) which are recorded and described from marine Eocene to Pliocene sediments. You may check: Spiegler, D. & Daniels, C. von (1991): A stratigraphic and taxonomic atlas of Bolboforma (Protophytes, incertae sedis, Tertiary). Journal of Foraminiferal Research 21 (2): 126-158 or Murray, J.W. (1984): Biostratigraphic value of Bolboforma, Leg 81, Rockall Plateau. Initial Reports of the DSDP LXXXI: 535-539.
Best wishes, Mike
Have you thin sectioned the material? Also, what are the cell like structures on the ?test of the organism. They almost look like pores and/or the outline of cellular structures. Very interesting material Ahmed, I wish I could give you an answer but I am afraid anything I had to say would be just a guess on my part.
Best Regards, Karl
Unfortunately, the specimens are not in my hands, they are in Oman with my friend. and no thin section available so far. thanks for your welling to help
best regards
Ahmed
Dear Dr. Muftah,
The 'chambers' you are talking about can only be confirmed after internal examination. The 'sutures' may merely be surface ornamentation, without any corresponding internal processes and, as such, the internal space may be undivided. If these possibilities are valid and the host rock is marine then the specimen may be considered to represent some unilocular 'flask-shaped' laginid foraminifera.
Best Regards, Siddhartha
I guess so, but the equatorial section according to the founder shows test divided into four triangular chambers as described by the founder,
Any advise to identify this tooth from Lower Miocene Limestone in Cyrenaica, NE Libya..
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