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Today, I found the following fossil in calcareous deposits from cental spain which are probably from the upper cretaceous. The little pores visible on the outside, make me think off a coral. What do you think?
that first image gave me a hint of an ammonite/nautiloid series fossil with the curved ridged structure ... very hard to tellDrDu said:Today, I found the following fossil in calcareous deposits from cental spain which are probably from the upper cretaceous. The little pores visible on the outside, make me think off a coral. What do you think?View attachment 209879
Bacculite?DrDu said:porringer shaped, which I do not expect from an ammonite. Also there is no helical structure.
Thanks for the updateDrDu said:Finally, I had the opportunity to show the pictures to a professional palaeontologist in a museum. He identified the fossil as a sponge, most probably from the group of hexactinellids.