Altenaeum narchii (Passos & Domaneschi, 2006)

18. Altenaeum narchii (Passos & Domaneschi, 2006) View in CoL [ Figs 9F–J View FIGURE 9 ]

Mysella narchii Passos & Domaneschi, 2006: 390 View in CoL , figs 1–5

Material examined. • 28 spms, Stn. 2; • 43 spms, Stn. 4; • 4 spms, Stn. 5; • 26 spms, Stn. 7; • 115 spms, Stn. 8; • 2 spms, Stn. 9; • 2 spms, Stn. 10; • 45 spms, Stn. 11; • 20 spms, Stn. 13; • 9 spms, Stn. 14; • 12 spms, Stn. 15.

Type locality. In front of the Brazilian Antarctic Station, Admiralty Bay on King George Island , South Shetland Islands, 5–25 m.

Bathymetric distribution. 0–100 m.

Substrate. Hard and soft bottom.

Geographical distribution. ANTARCTICA:Antarctic Peninsula ? SUBANTARCTICA : -. SCOTIA ARC: South Shetland Islands. SOUTH AMERICA: -.

Remarks. The main morphological differences to A. charcoti have already been mentioned in the previous species and have been worked out by Passos & Domaneschi (2006). There also seem to be ecological differences. Altenaeum narchii can be found very frequently in the intertidal, but also colonises deeper areas, often together with A. charcoti . We found A. narchii in a depth between 0 and 90 m. It was the fifth most common species in the intertidal. The species is already known from the Maxwell and Admiralty Bays.

References. Passos & Domaneschi (2006), Bick & Arlt (2013).