Sertularella gaudichaudi (Lamouroux, 1824)

Material examined: BBB 2016: St. 13.

Distribution: Southern hemisphere, Kerguelen and Crozet shelves (Millard 1977), off Bouvet Is. (Peña Cantero & Gili 2006), South Shetland islands (Stepanjants 1979). In the Southwestern Atlantic Ocean the species was reported in Malvinas / Falkland Islands (Kirchenpauer 1884 as Sertularella gaudichaudii).

Remarks: We found unfertile colonies detached from the substrate.

Sertularella gayi (Lamouroux, 1821)

Material examined: BBB 2016: St. 12; St. 33; St. 34; St. 39.

Distribution: Atlantic species with a wide distributional range in the tropical, sub-tropical and temperate waters; also reported in New Zealand (Vervoort 1972). In the southwestern Atlantic Ocean the species was previously reported in Argentina from 41°S to 56°S (Oliveira et al. 2016). Blanco (1994) reported this species (as S. gayi gayi) at Burdwood bank, 380–400 m depth; consequently this is the first record in MPA Namuncurá I.

Remarks: Big and unfertile colonies were found.