Fig. 5
From: Middle Triassic gastropods from the Besano Formation of Monte San Giorgio, Switzerland
Accumulations of small turriculate gastropods: larval-postlarval stages belonging to Caenogastropoda: a PIMUZ 37341 with a ceratitid ammonoid (lower left). Point 902/Mirigioli (Monte San Giorgio), Middle Besano Formation (bed 76); b PIMUZ 37340, three silicified gastropods (bottom and upper right) together with two silicified ceratitid ammonoids (Repossia acutenodosa Rieber, 1973). Valle Stelle (Monte San Giorgio), Middle Besano Formation (bed 69)