Hydrodendron arboreum (Allman, 1888) (*)

Ophiodissa arborea — Briggs, 1938: 11 –13.

Hydrodendron arboreum — Peña Cantero & Ramil, 2006: 952 –953, fig. 2c (synonymy).

Remarks. Briggs (1938) reported the species at depths between 46 and 549 m in Commonwealth Bay and at 66°52’S – 145°30’E, off Mertz Glacier. Pan-Antarctic distribution (Peña Cantero & Ramil 2006).