Diacyclops (copepoda: Cyclopoida) in Continental Antarctica,

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TitleDiacyclops (copepoda: Cyclopoida) in Continental Antarctica, including three new speciesAbstractContrary to earlier beliefs, crustaceans are present in ice-covered lakes of Antarctica. Interpretation of the significance of this has been hampered by the absence of robust identification of taxa present. We examine cyclopoid copepods from three widely separated lakes. All belong to the michaelseni group of the genus Diacyclops, which is widespread across Continental Antarctica, but do not fit into any existing species. Two new species were identified from eastern Antarctica, D. walkeri from Pineapple Lake (Vestfold Hills) and D. kaupi from Transkriptsii Gulf (Bunger Hills). Most significant was a dense population of a new epibenthic species (D. joycei) associated with microbial mats in Lake Joyce, one of the smaller McMurdo Dry Valleys lakes. This represents the first record of adult cyclopoid copepods from the ice-covered lakes of the Transantarctic Mountains. Continental Antarctica is the centre of diversity for this group of crustaceans and we argue that this is better explained by persistence through past glacial advances rather than by recent post-glacial colonization. The existence of a species endemic to Lake Joyce but apparently absent from other Dry Valleys lakes is discussed in relation to our understanding of the history of the McMurdo Dry Valleys lakes and their faunas. Copyright Antarctic Science Ltd 2013.AcknowledgementsWe are extremely grateful to the support from NASAÅ› Exobiology (NNX08AO19G) and Astrobiology (NNZ09AE77A) programmes; logistic support was provided by the US National Science Foundation Office of Polar Programs. This paper contributes to the Australian Antarctic Division project ASAC 2355 (MIS). Dr Martin J. Riddle is acknowledged for supporting this work. Comments from Dr Slava Ivanenko and two anonymous reviewers greatly improved our paper.

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1st AuthorKaranovic, T.AuthorKaranovic, T.Gibson, J.Hawes, I.Andersen, D.Stevens, M.Year2014JournalAntarctic ScienceVolume26Number3Pages250-260DOI10.1017/S0954102013000643URLhttps://www.scopus.com/inward/recor.....ee5060b76533ec9ffe1d84ca7Keywordsbenthic environmentcrustaceanlacustrine environmentmicrobial matnew recordnew speciesPostglacialspecies diversitytaxonomyzoogeographyendemic speciesice cover, AntarcticaEast AntarcticaMcMurdo Dry ValleysTransantarctic MountainsBunger HillsVestfold Hills, CopepodaCrustaceaCyclopoidaDiacyclops, rank3Author KeywordsBiodiversitybiogeographycrustaceansMcMurdo Dry Valleys lakes

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TypeArticleCitationKaranovic, T., Gibson, J., Hawes, I., Andersen, D. and Stevens, M. (2014). Diacyclops (Copepoda: Cyclopoida) in Continental Antarctica, including three new species. Antarctic Science, 26(3): 250-260 IdentifierKaranovic2014Relevancerank3

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Hawes, I.