FIGURE 6. A–K in The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species

FIGURE 6. A–K. Tugonia (Tugonia) huanghaiensis Xu, 1987. A–F, holotype, MBM no.73M-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.57M-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).