28. Nacella concinna (Strebel, 1908) [Figs 12A–D]

Patinella polaris var. concinna Strebel, 1908: 81, pl. 5 figs 76–82

Material examined. • 2 spms, Stn. 4; • 1 spm, Stn. 5; • 2 spms, Stn. 6; • 7 spms, Stn. 7; • 1 spm, Stn. 10; • 11 spms, Stn. 13; • 2 spms, Stn. 14; • 3 spms, Stn. 15.

Type locality. South Georgia.

Bathymetric distribution. 0–150 m.

Substrate. Hard bottom.

Geographical distribution. ANTARCTICA: Antarctic Peninsula. SUBANTARCTICA: -. SCOTIA ARC: South Georgia, South Sandwich Islands, South Orkney Islands, South Shetland Islands. SOUTH AMERICA: -.

Remarks. We found it at several stations between intertidal and 100 m. The species is already known from Maxwell and Admiralty Bays. Gonzáles-Wevar et al. (2019) present new molecular analyses and a comprehensive morphological revision of Nacella, which confirms the validity of all currently recognised species (and one new one), but also includes important changes to the published distributions of some species.

References. Arnaud et al. (1986), Rauschert (1991), Aldea & Troncoso (2008, 2010a), Engl (2012), Bick & Arlt (2013), Aghmich et al. (2016), Gonzáles-Wevar et al. (2019).