Representatives of the Antarctic and deep-sea genera of
octopuses. (a) Pareledone charcoti, a shallow-water species from the
Antarctic Peninsula. (b) Thaumeledone gunteri, a deep-water species
endemic to South Georgia. (c) Megaleledone setebos, a shallow water
circum-Antarctic species endemic to the Southern Ocean. Specimen
shown is juvenile; adults reach a total length of nearly 1 m. (d) Adelieledone polymorpha, a species endemic to the western Antarctic.
All specimens illustrated are adult unless speciï¬ed and were collected
from the South Shetland Islands except T. gunteri from South Georgia.
Scale bars all represent 1 cm.
(from Strugnell, JM, Rogers AD, Prodo PA, Collins MA, Allcock AL (2008) The thermohaline expressway: the Southern Ocean as a centre of origin for deep-sea octopuses. Cladistics 24:1-8)