Porifera

Sphaerocladina Schrammen, 1910

Selection of related publications
Rhebergen, F. 2009. Ordovician sponges (Porifera) and other silicifications from Baltica in Neogene and Pleistocene fluvial deposits of the Netherlands and northern Germany. Estonian Journal of Earth Sciences 58, 1, 24-37. DOI:10.3176/earth.2009.1.03
Rhebergen, F. 2007. Revision of the species Astraeospongium Patina Roemer, 1861, based on Ordovician bedrock specimens from Estonia. GFF 129, 1, 17-22. DOI:10.1080/11035890701291017
Rhebergen, F. 2004. A new Ordovician astylospongiid sponge (Porifera) as an erratic from Baltica . Netherlands Journal of Geosciences 83, 4, 255-265. DOI:10.1017/S0016774600020357
Rhebergen, F. Kempen, T. van 2002. An unusual Silurian erratic astylospongiid (Porifera) from Gotland, Sweden. GFF 124, 4, 185-192. DOI:10.1080/11035890201244185
Rhebergen, F., Hacht, U. von 2000. Ordovician erratic sponges from Gotland, Sweden. GFF 122, 4, 339-349. DOI:10.1080/11035890001224339