Porosphaera globularis (Phillips, 1829) (Porifera, Calcarea) in the Campanian (Upper Cretaceous) of extra-Carpathian Poland
Authors
Agata Jurkowska
Institute of Geological Sciences Jagiellonian University, Oleandry 2a St. PL-30-063 Kraków. (current address) Faculty of Geology, Geophysics and Environmental Protection AGH, University of Science and Technology, Mickiewicza 30, PL-30-059 Kraków
Ewa Świerczewska-Gładysz
Institute of Earth Sciences, University of Lodz, ul. Narutowicza 88 St., PL-90-139 Łódź
Zofia Dubicka
Institute of Geology, University of Warsaw, al. Żwirki i Wigury 93, PL-02-089 Warszawa
Danuta Olszewska-Nejbert
Institute of Geology, University of Warsaw, al. Żwirki i Wigury 93, PL-02-089 Warszawa
The stratigraphical distribution of Porosphaera globularis, a common calcareous sponge in the Upper Cretaceous (mostly Campanian and Maastrichtian) of Poland was studied. The presented material, both new and from museum collections, comes from the Campanian of the Miechów Synclinorium, in southern Poland, and from the Lower Campanian of Mielnik in the south-eastern part of the Mazury-Podlasie Homocline, in eastern Poland. The significance of the species in extra-regional correlation, its palaeobiogeography and stratigraphical potential is critically reviewed.
