Pseudotachidius jubanyensis (Copepoda: Harpacticoida): A new species from Antarctic shallow waters and its ecology
Tóm tắt
A new species of the genusPseudotachidius T.Scott, 1898 from Potter Cove on King George Island, South Shetland Islands, Antarctica is described. It is confirmed that the genusPseudotachidius can be separated into two groups: thesimilis- and thecoronatus-group due to the shape of the PI, the rostral setation, a modified Mxp and the female P5.Pseudotachidius jubanyensis sp. nov. is the first representative of the genus to be found in such shallow waters (20 m depth). The characterization of the site as a low energy soft bottom habitat gives rise to the assumption that in Antarctic shallow waters members of the mainly deep-sea genusPseudotachidius encounter suitable conditions. Despite its low individual numbersPseudotachidius jubanyensis nearly outranges all other harpacticoid copepods regarding biovolume per sediment surface unit because of its large body size. Therefore it tends to play an important role in the benthic meiofauna community.
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