Melanostomias Biseriatus
Body moderately long, its depth less than 10 times into SL. Head with short, blunt, ronded snout; lower jaw not longer than upper jaw, not curved strongly upward. Pectoral fin with 5–6 rays, all about equal in length, unbranched distally, and without lumps of luminous tissue; pelvic fins low on body, their insertaion close together near mid-ventral line; bases of dorsal and anal fins about equally long, their origins appraximately opposed; no dorsal adipose fin. Photophores in ventral row between pectoral- and pelvic-fin inseration (PV) 26–29; no pale loop or line on flank; postorbital photophore large, as long as width of eye and approximately triangular in shape; no anterior orbital photophore. No Large patches of luminescent tissue behind eye.