(Table 1) Occurrences of Epimeria georgiana species complex (Amphipoda) in the Weddel and Scotia Sea ...

• Main Authors: Lörz, Anne-Nina, Smith, Peter, Linse, Katrin, Steinke, Dirk
• Format: Dataset
• Language: English
• Published: PANGAEA 2012
• Subjects: Event label; Latitude of event; Longitude of event; Species; Comment; Identification; Sample amount; Station label; DEPTH, water; Depth, top/min; Depth, bottom/max; DATE/TIME; Cruise/expedition; Area/locality; Multiple investigations; Bottom trawl; Epibenthic sledge; Agassiz Trawl; JR20060226; ANT-XIV/2; ANT-XVII/3; ANT-XXI/2; TAN0402; TAN0802; James Clark Ross; Polarstern; Tangaroa; International Polar Year 2007-2008 IPY; International Polar Year; IPY; Scotia Sea; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.815864; https://doi.pangaea.de/10.1594/PANGAEA.815864

DNA barcoding revealed four well-supported clades among amphipod specimens that keyed out to Epimeria georgiana Schellenberg, 1931, three clades with specimens from the southern Scotia Arc and one clade with specimens from the Weddell Sea. Detailed morphological investigations of sequenced specimens were conducted, through light and scanning electron microscopy. High magnification (500-2,000 fold) revealed features such as comb-scales on the first antenna and trich bearing pits on the fourth coxal plate to be similar for all specimens in the four clades. Consistent microstructure character differences in the Weddell Sea specimens combined with high genetic distances (COI divergence>20%) allowed the description of Epimeria angelikae, a species new to science. Specimens of E. georgiana in the other three COI clades from the Scotia Arc were morphologically indistinguishable. Representative specimens of clade A are also illustrated in detail. Our results on the high genetic divergences in epimeriid amphipods ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...