A true circum-Antarctic species, usually recorded south of the Antarctic Polar Front; bathypelagic (Tiefenbacher 1991; Hayashi 2004); but with one record north of Kerguelen Islands (Ledoyer 1979). Synonym: Pasiphaea longispina Lenz & Strunck, 1914 (see Iwasaki & Nemoto 1987a; Hayashi 2004).