Gerhard Sauer

from his collection

Diarthema sp.; Oxfordian, Jurassic; Wagnon, Ardennes Department, France; 29 mm; Coll. Gerhard Sauer

Dicroloma sp.; Cordatum-zone, lower Oxfordian, Jurassic; Draize, Ardennes Department, France; Coll. Gerhard Sauer

Pietteia seminuda (Hebert & Deslongchamps, 1860); Cordatum zone, lower Oxfordian; Ardennes, Belgium; Coll. Gerhard Sauer

Pietteia sp.; middle Callovian, Jurassic; Chemilli, Orne Department, France; Coll. Gerhard Sauer