Hello Abbas,

Did you ever notice any peduncle at its base?

It looks like a sponge cast...

Please refer to Termier & Termier (Bull. Soc géol. Normandie Amis Muséum du Havre) in the 1960s-1970s, or some chalk fossil papers in this same periodical.

Best

Bruno Ferré

Dear Bruno,

Many thanks for your reply. Unfortunately, I don't have the reference that you meant. Do you have any PDFs?

All the Best

dear Bruno, see in email box. Kind regs, Tom

Dear Abbas,

I shall fetch the paper in my library and send you a numerical copy.

Tom suggested a Pyrgopolon serpulid tube, but I still think your specimen is too big (or else it is a gigantic form).

Did you find it as an isolate specimen or did you find any others?

Best

Bruno Ferré

Dear Bruno,

There is no trace of the peduncle at the base. Both ends of the barrel structure are the same and seem to be hollow. The surface of the specimen is completely smooth and there are no pores that support the spongy appearance and texture. The outer shell is very thin and it is not possible to see the wall of a sponge.

For Pyrgopolon, as you said, this specimen is too big.

This specimen was found isolated among the shales, although as I wrote and it is clear in the photographs, there was a thick but loose clay sheath around the main core, which was broken and crushed during the separation of this sheath.

Many thanks for sending the paper. I will wait.

Sincerely yours