Fig. 4. Eyes (A, B), occipital region (C, D), and inner surface of pectoral-fin base (E, F) of M. heterodon (A, C, E) and M. grandoculis (B, D, F), showing differences between the two species. A, KAUM–I. 88394, 215.0 mm SL, fresh condition; B, D, F, KAUM–I. 46014, 185.5 mm SL, fresh (B) and preserved (D, F) conditions; C, E, URM-P 34768, 189.1 mm SL, preserved condition.