Peronidella Explained

Peronidella is an extinct genus of Calcareous sponges found in marine sedimentary rocks dated between the Devonian and the Cretaceous periods.^{[1] [2]}

These sponges had cylindrically shaped walls, with a typical diameter of 2 cm, with a small platform at the top, showing the position of the Osculum.Many species, such as Peronidella furcata, were colonial; however, several solitary species are known.

These sponges are relatively abundant in European chalks

Notes and References

1. Imanov. M., Hrdlickova., S., and Gregorova., R., (2005), The Complete Encyclopedia of Fossils, 3rd ed, Lisse: Rebo International, b.v., page 40
2. Fossilworks, http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=3689, accessed 13 January 2014