Alexandrella polarsterni ( Berge & Vader, 2005 )

d’Acoz, Cédric d’Udekem & Verheye, Marie L., 2017, Epimeria of the Southern Ocean with notes on their relatives (Crustacea, Amphipoda, Eusiroidea), European Journal of Taxonomy 359, pp. 1-553 : 173-174

Alexandrella polarsterni ( Berge & Vader, 2005)

Bathypanoploea polarsterni Berge & Vader, 2005b: 81–83 , fig. 1.

Bathypanoploea polarsterni – Berge & Vader 2005c: 5, figs 7–9.

Alexandrella sp. n. – Rauschert & Arntz 2015: 79, pl. 72.

Distribution

Northwest of Elephant Island, 60°54.60ʹ S, 55°45.90ʹ W, 235 m (holotype); southwestern Atlantic, off Argentina (off the province of Río Negro), 40°14ʹ06″ S, 55°24ʹ07″ W, 1475 m (paratype) ( Berge & Vader 2005b, 2005c).

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 (2005b, 2005c), 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°56.99ʹ S, 10°48ʹ26″ W to 70°56.97ʹ S, 10°47.7ʹ W [eastern shelf of the Weddell Sea], 402– 405 m.