Fig. 2From: Middle Triassic gastropods from the Besano Formation of Monte San Giorgio, SwitzerlandFrederikella cf. cancellata (Zardini 1978). The original specimen PIMUZ 29952 with external mold (apical side) in association with Daonella cf. angulata Rieber 1968. Point 902/Mirigioli (Monte San Giorgio), Lower Besano Formation (bed 47)Back to article page