Where is your specimen from? It looks somewhat like a nummulite (foraminifera)

It looks like large foraminifera (Calcarina?) please put "magnification"

Dear all nor Calcarina nither Nummulites belong to Paleozoic, as you might know Trilobites were extinct at the end of Paleozoic, this speciemen, seen together with Trilobites fragments, though shows some resembelence to foraminera, may not be foraminifera at all.

With regards

Number of filled chambers gives impression of Foraminifera but should not be as Hosseini wrote.

Dear all

I absolutely apologize, this speciemen belongs to Early Jurassic the fragments I took mistakenly as Trilobite are special shell fragments with curvature of pieces similar to trilobite, Therefore the speciemen above is indeed foraminifera.

With my best regards

Still it can not be Nummulites, as they are not reported from Early Jurassic. It may be some primitive rotaliid or miliolid.

Dear Dr Shcukla

This speciemen might be Cristellaria sp. if so, it belongs to the family Lagenidae. Both Lagenids and Rotaliids have hyaline wall, however the microstructure is different which is only observable in SEM photos. It definitely not belongs to miliolids since their wall is in most species imperpeforate and do not let light to pass through, therefore in thin-sections the wall is seen dark.