Heptaprimnoa patagonica Cairns, 2012

Material examined: BBB 2016: St. 21.

Distribution: Southwestern Atlantic off Argentina: continental slope off Mar del Plata, (40°00’S, 56°02’W, 520 m), continental slope off Patagonia (44.872°S, 59.635°W, 1248 m; 45.068°S, 59.501°W, 776 m; 45.605°S, 59.773°W, 1232 m); Malvinas Islands (48°54’S, 56°52’W, 780 m); Burdwood bank (54°10’S, 56°40’W, 265 m) (Cairns 2012); Burdwood bank (767 m) (present study).

Remarks: One of the paratypes of this species was obtained from the Burdwood bank (54°10’S, 56°40’W, 265 m) (Cairns 2012). Cairns’s specimens are uniplanar colonies and dichotomously branched with 8–10 polyps per whorls, whereas our specimen is a liriform colony with 7–8 polyps in each whorl.