Geographic distribution.—Lasiognathus dinema is known from three female specimens collected in the northern Gulf of Mexico, over the Mississippi Fan bathyal accumulation
(27–28uN, 87–90uW; bottom depths 2000–3000 m). Specimens were collected in closing trawls fished between 800– 1000 and 1000–1200 m, and in a non-closing trawl fished between 0–1271 m.
Etymology.—The name dinema, is derived from the Greek, di, a prefix meaning ‘‘two,’’ and nema, ‘‘thread,’’ in allusion to the two elongate, thread-like prolongations emerging anteriorly from the bases of the escal hooks of this species (Figs. 1–3).