Iberian Peninsula Portugal
Geological Time: Neogene Miocene Tortonian
the specimen was picked and photographed by Michael Hesemann
with assistance of Dr. Georg Rosenfeldt, the raw material is provided by
umbilical view
The identification is based upon:
Hayward, B W, Grenfell, H R, Sabaa, A.T, Neil, H.L, Buzas, M.A., 2010: