Tarik Nasser, many thanks that is a superb resource. To that list I must add an Uncatoella from the Lower Carboniferous of Scotland.

Hi Lyall, regarding your question I remember a paper by my former supervisor Jörg Schneider to be cited as follows:

Schneider, J., Gebhardt, U. (1992): Dasycladaceen und andere "marine" Algen in lakustrischen Kalken des Unter-Perm (Assel) im intramontanen Döhlen-Becken (Elbe-Zone). Freiberger Forschungshefte, C 445: 66-88; Leipzig.

The strange occurrence of these algae in an intermontaneous basin was the subject of this study, unfortunately in German, however, there is another paper that may provide more general information about this occurrence and is easier to get for you:

Schneider, J. (1994): Environment, biotas and taphonomy of the lacustrine Niederhäslich Limestone, Döhlen Basin, germany. Transactions Royal Soc. Edinb.: Earth Sci., 84: 453-363.

I will inform Jörg, probably he can send a copy to you or some photographs for comparison.

Best wishes Ronny

Thank you Ronny. Much appreciated.