Powellisetia deserta

45. Powellisetia deserta (E. A. Smith, 1907) [Fig. 16G] Rissoia deserta E. A. Smith, 1907: 9, pl. 2, fig. 1 Material examined. • 4 spms, Stn. 14. Type locality. McMurdo Sound (Ross Sea), 18 m depth. Bathymetric distribution. 4–870 m. Substrate. Soft bottom. Geographical distribution. ANTARCTICA: Circum-Antarctic. SUBANTARCTICA: -. SCOTIA ARC: South Orkney Islands, South Shetland Islands. SOUTH AMERICA: -. Remarks. We found only very few individuals in a depth of 70 m. This species was already known from the study area from previous Soviet Antarctic expeditions in depths between 25 and 30 m. References. Ponder (1983), Dell (1990), Aldea & Troncoso (2010a), Engl (2012).