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Fig. 4 | Swiss Journal of Palaeontology

Fig. 4

From: Middle Triassic gastropods from the Besano Formation of Monte San Giorgio, Switzerland

Fig. 4

ad ?Trachynerita sp., Middle Besano Formation, uppermost Anisian. PIMUZ 37303: a apical side view, b side, c apical, and d apertural view. e ?Omphaloptycha sp. 1, Lower Besano Formation, uppermost Anisian. PIMUZ 37312: Abapertural view. f, g ?Omphaloptycha sp. 2, Lower Besano Formation, uppermost Anisian. PIMUZ 29951: f abapertural and g apertural view. Images ad have been obtained from original specimen; images eg from silicon casts

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