Pareledone is a genus of octopuses in the family Megaleledonidae.
Species Pareledone adelieana (Berry, 1917) Pareledone aequipapillae Allcock, 2005 Pareledone albimaculata Allcock, 2005 Pareledone antarctica (Thiele, 1920) * Pareledone aurata Allcock, 2005 Pareledone charcoti (Joubin, 1905) Pareledone cornuta Allcock, 2005 Pareledone felix Allcock, Strugnell, Prodohl, Piatkowski & Vecchione, 2007 Pareledone framensis (Lu & Stranks, 1994) Pareledone harrissoni (Berry, 1917) Pareledone panchroma Allcock, 2005 Pareledone polymorpha (Robson, 1930) Pareledone prydzensis (Lu & Stranks, 1994 ) Pareledone serperastrata Allcock, 2005 Pareledone subtilis Allcock, 2005 Pareledone turqueti (Joubin, 1905), Turquet's octopus
The species listed above with an asterisk (*) are questionable and need further study to determine if they are valid species or synonyms.
RNA editing Some octopuses exhibit the ability to alter speeds of sodium and potassium ion movement across cell membranes, allowing them to live in very cold water. Researchers at the University of Puerto Rico's Institute of Neurobiology found that a member of the Pareledone genus collected from McMurdo Station, Antarctica could speed up the gating kinetics of its potassium channels in cold water to keep up with sodium ion exchange, whose channel is less temperature sensitive. This alteration in the rate of opening is accomplished through RNA editing, in which specific deamination of an adenosine nucleotide to inosine results in a change in a single amino acid in the potassium channel's voltage sensor, destabilizing the open state. They are now looking into whether individuals can alter their protein synthesis in response to changing temperatures, or if this change occurs species-wide, over long-term adaptations. If changes are possible by the individual, these octopuses might be able to adapt quickly to changing climate scenarios.
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