Tremabolites sp. (Zittel 1877)

Perfect sponges collection, Roger!!!!!

Who said sponges fossils aren't charming????

Thanks, Astrinos! When they're well-preserved they can be quite spectacular.

very nice specimen

Thanks Herb.

May be it is T. megastoma?

Thanks for the suggestion. I'm by no means an expert. By most of the IDs my colleagues from Steinkern helped me. Spongebob thinks this one could also be Ventriculites.