dc:description"FIGURE 7. A – L. Tugonia (Distugonia) sp., A – I, L, MBM 188705, length = 9 mm. A. Exterior of right valve. B. Exterior of left valve. Scale bar (A, B) = 2 mm. C. Hinge of right valve. Scale bar = 1 mm. D. Interior of right valve. E. Interior of left valve. Scale bar (D, E) = 2 mm. F. Hinge of left valve. Scale bar = 1 mm. G. Close up of umbo on right valve. H. Close up of umbo on left valve. Scale bar (G, H) = 1 mm. I. Close up of surface sculpture. Scale bar = 1 mm. L. Dorsal view of both valves joined. Scale bar = 2 mm. J & K, MBM 188706, length = 7.60 mm. J. Exterior of right valve. K. Interior of right valve. Scale bar (J, K) = 2 mm. M. Tugonia (Distugonia) decurtata (A. Adams, 1851) (after original figure from Sowerby II, 1875: pl. 3, fig. 11). N – O. Tugonia (Distugonia) inopinata (Iredale, 1936) (after original figure from Iredale, 1936: pl. 21, figs. 6, 7).";
dc:description"FIGURE 6. A – K. Tugonia (Tugonia) huanghaiensis Xu, 1987. A – F, holotype, MBM no. 73 M- 030, length = 19.8 mm. A. Exterior of right valve. B. Exterior of left valve. Scale bar (A, B) = 2 mm. C. Hinge of left valve. Scale bar = 2 mm. D. Interior of right valve. E. Interior of left valve. Scale bar (D, E) = 2 mm. F. Close up of surface sculpture. Scale bar = 2 mm. G – K, paratype, MBM no. 57 M- 101, length = 16.2 mm. G. Exterior of right valve. H. Exterior of left valve. Scale bar (G, H) = 5 mm. I. Hinge of left valve. Scale bar = 2 mm. J. Interior of right valve. K. Interior of left valve. Scale bar (J, K) = 5 mm. L. Tugonia (Distugonia) decurtata (A. Adams, 1851). From Okutani (2000: pl. 508, fig. 4, with permission from author).";