Alexandrella polarsterni (Berge & Vader 2005)
- Dataset
- Epimeria of the Southern Ocean with notes on their relatives (Crustacea, Amphipoda, Eusiroidea)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Amphipoda
- family
- Stilipedidae
- genus
- Alexandrella
- species
- Alexandrella polarsterni
discussion
Remarks The conspecificity between the holotype of Alexandrella polarsterni collected off Elephant Island at 235 m and the paratype collected off Argentina at 1475 m looks a priori suspect, based on the differences in location and depth, but cannot be refuted herein. The photograph of “ Alexandrella sp. nov. ” given by Rauschert & Arntz (2015) matches very well with the figures of Berge & Vader (2005 b, 2005 c), especially for the shape of the mid-dorsal carina of urosomite 1; hence this specimen is identified as such. Rauschert & Arntz (2015) do not indicate the coordinates of their specimen, but in an early draft of their book made available to the authors, the following information was given: ANT-XXI / 2, stn 145, 400 m, 7 mm. The coordinates of the station 145 - 1 (epibenthic sledge) are: 70 ° 56.99 ʹ S, 10 ° 48 ʹ 26 ″ W to 70 ° 56.97 ʹ S, 10 ° 47.7 ʹ W [eastern shelf of the Weddell Sea], 402 – 405 m.
distribution
Distribution Northwest of Elephant Island, 60 ° 54.60 ʹ S, 55 ° 45.90 ʹ W, 235 m (holotype); southwestern Atlantic, off Argentina (off the province of Río Negro), 40 ° 14 ʹ 06 ″ S, 55 ° 24 ʹ 07 ″ W, 1475 m (paratype) (Berge & Vader 2005 b, 2005 c).