Skenella umbilicata Ponder, 1983

Zettler, Michael L. & Bick, Andreas, 2025, Molluscs from a shallow bay of King George Island (Antarctica, South Shetland Islands): An annotated checklist with new distributional records, Zootaxa 5631 (3), pp. 401-450 : 427

32. Skenella umbilicata Ponder, 1983 [ Figs 13E – G ]

Skenella umbilicata Ponder, 1983: 28 , figs 22a–d, 26e

Material examined. • 13 spms, Stn. 12.

Type locality. Borge Bay , Signy Island (South Orkney Islands), 4-10 m.

Bathymetric distribution. 4–20 m.

Substrate. Hard and soft bottoms.

Geographical distribution. ANTARCTICA: Ross Sea to Adelie Land, Antarctic Peninsula. SUBANTARCTICA: -. SCOTIA ARC: South Orkney Islands, South Shetland Islands. SOUTH AMERICA: -.

Remarks. Our observation comes from a depth of 15 m. The maximum shell height of our material was 1.65 mm. The species is already known from Maxwell Bay. It can reach very high abundances on macroalgae as described by Amsler et al. (2022) from Lichfield Island (Palmer Archipelago).

References. Ponder (1983), Engl (2012), Amsler et al. (2022).

Figures

FIGURE 13. A–D: Skenella paludinoides (E. A. Smith, 1902); E–G: Skenella umbilicata Ponder, 1983; H–K: Eatoniella caliginosa (E. A. Smith, 1875); L–O: Eatoniella kerguelenensis (E. A. Smith, 1875). Unless otherwise indicated, the scale is always 1 mm.