This is a rarely offered "Solnhofen - Ammonite" of the species Fontanesiella prolithographicum from Daiting. This specimen does have the aptychus preserved. The ammonite does have a diameter of about 44 mm.
|Size of stone:||about 120 x 75 mm|
|Age:||Upper Jurasic , Malm zeta (about. 150 Mill. years)|