Hydrurga leptonyx (de Blainville, 1820) . J. Phys. Chim. Hist. Nat. Arts Paris, 91:298.

TYPE LOCALITY: "des environs des îles Falckland ou Malouines" [Falkland Isis (UK)] .

DISTRIBUTION: Circumpolar, in southern oceans (Antarctica, Australia, Chile, Kerguelen Islands, South Sandwich Isis, Falkland Isis, southern Africa, New Zealand).

SYNONYMS: homei Lesson, 1828.