North European Plain Germany
Geological Time: Neogene Miocene
Reinbekian
the raw material was collected, the specimens extracted and photographed by Dieter Ketelsen
identified with Daniels 1990
The identification is based upon:
, : Silvestri, A. (1904). Ricerche strutturali su alcune forme dei Trubi dei Bonfornello (Palermo). Memorie dell'Accademia Pontificia dei Nuovi Lincei. 22: 235-276. Plate , Fig.