Stenothecoid molluscs from China 
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Figure 4 A-I, Bagenovia d. sajanica I lorny. A-D, NIGP 116388, Xidashan Formation, Kuruktag, Xinjiang, A.plan 
view, x 5. B. enlargement of dorsal keel, showing the cancellated sculpture, x 15. C-D. adapical and lateral 
views, x 5. E-I, NIGP 116389, E, plan view, x 6. F. enlargement of valve, to emphasize the internal 
structures, x 12. G-l. adapical, right and left side views, x 5. 
