(Fig. 3 J)
Material examined. 13 specimens, 642.0–1188.0 mm TL: MNRJ 26767 (3, 680.0–754.0 mm, 1 cs), T, E- 540; MNRJ 26773 (1, 1141.0 mm), T, E- 526; MNRJ 26775 (1, 1048.0 mm), T, E- 526; MNRJ 26783 (3, 642.0–799.0 mm), T, E- 496; MNRJ 26784 (1, 852.0 mm), T, E- 537; MNRJ 26785 (1, 1049.0 mm), T, E- 525; MNRJ 26786 (1, 724.0 mm), T, E- 527; MNRJ 26787 (1, 1045.0 mm), T, E- 527; MNRJ 26788 (1, 1188.0 mm), T, E- 527.
Distribution. Diastobranchus capensis was described from South Africa. It is known from temperate waters of the eastern South Pacific, Indian Ocean, and WSA (Castle 1986 b; Parin et al. 1995; Sulak & Shcherbachev 1997; Brickle & Laptikhovsy 2002). Recently, several specimens were collected in the western North Atlantic off New England, USA (about 40 º N), thus extending the known distribution of the species to the northern hemisphere (Moore et al. 2003).