The Mysidae (Crustacea, Mysida) of the ANDEEP I-III expeditions to the Antarctic deep sea with the description of twelve new species, establishment of four new genera and with world-wide keys to the species of Erythropinae and Mysidellinae Author Wittmann, Karl J. text European Journal of Taxonomy 2024 2024-06-20 940 1 180 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2577/11717 journal article 300006 10.5852/ejt.2024.940.2577 a75a07e9-c949-4f7b-8f54-ee05ab7d5ac5 2118-9773 12206315 19DE5E4F-3A2C-41FF-A593-A4C74F7A9ABD Neobirsteiniamysis inermis ( Willemoes-Suhm, 1874 ) Petalophthalmus inermis Willemoes-Suhm, 1874 : xv. Material examined SOUTHERN OCEAN • 1 ♀ ad. (BL = 72.9 mm ); NE Weddell Abyssal Plain, near fracture zone , ANDEEP-II station 137-4; 63°44.99ʹ S , 33°47.74ʹ W to 63°44.78ʹ S, 33°47.81ʹ W; depth 4975.7– 4975.1 m ; 14 Mar. 2002 ; EBS supranet • 1 ♀ imm. (BL = 28.5 mm ); NE Weddell Sea , Kosminski Fracture Zone deep , ANDEEP-II station 138-6; 62°58.09ʹ S , 27°54.54ʹ W to 62°58.02ʹ S, 27°54.25ʹ W; depth 4542.5– 4541.1 m ; 17 Mar. 2002 ; EBS supranet • 1 ♂ ad. (BL = 57.8 mm ), 1 ♀ subad. (BL = 52.4 mm ); eastern Weddell Abyssal Plain , S of Maud Rise and E of Sanae Canyon , ANDEEP-III station 059-5; 67°29.74ʹ S , 00°01.93ʹ W to 67°29.61ʹ S, 00°02.19ʹ W; depth 4655– 4655 m ; 14 Feb. 2005 ; EBS supranet • 1 imm. (BL = 13.4 mm ); eastern Weddell Slope , Kapp Norvegia, ANDEEP-III station 078-10; 71°09.39ʹ S , 13°59.30ʹ W to 71°09.36ʹ S, 13°58.81ʹ W; depth 2156– 2147 m ; 21 Feb. 2005 ; EBS supranet • 1 ♀ imm. (BL = 21.0 mm); Weddell Abyssal Plain , ANDEEP-III station 102-13; 65°34.32ʹ S , 36°31.32ʹ W to 65°34.40ʹ S, 36°31.07ʹ W; depth 4805– 4803 m ; 6 Mar. 2005 ; EBS epinet • 1 imm. (BL = 18.0 mm), 1 juv. (BL = 14.2 mm ); Weddell Abyssal Plain , ANDEEP-III station 110-8; 65°00.52ʹ S , 43°02.09ʹ W to 65°00.68ʹ S, 43°02.16ʹ W; depth 4698– 4696 m ; 10 Mar. 2005 ; EBS supranet • 1 juv. ( BL = 10.2 mm ); Drake Passage , NW of Elephant Island , ANDEEP-I station 042-2; 59°40.29ʹ S , 57°35.43ʹ W to 59°40.42ʹ S, 57°35.27ʹ W; depth 3683– 3680 m ; 27 Jan. 2002 ; EBS epinet • 1 ♂ subad. (BL = 36.2 mm ), 1 ♀ imm. (BL = 31.8 mm ), 2 juv. ; same collection data as for preceding; supranet • 1 ♀ subad. (BL = 45.5 mm ); South Shetland area , NNW of Elephant Island , ANDEEP-I station 043-8; 60°27.12ʹ S , 56°05.10ʹ W to 60°27.24ʹ S, 56°05.25ʹ W; depth 3961.2–3962.4 m ; 4 Feb. 2002 ; EBS epinet • 1 ♂ ad. (in 2 parts, BL = 47.8 mm ), 2 ♂♂ imm. (BL = 17.1–20.9 mm ), 1 ♀ imm. (BL = 19.9 mm ); Drake Passage , N of South Shetland Islands , ANDEEP-I station 046-7; 60°38.35ʹ S , 53°57.36ʹ W to 60°38.12ʹ S, 53°57.49ʹ W; depth 2893.6– 2893.2 m ; 30 Jan. 2002 ; EBS epinet • 9 ♂♂ ad. ( BL = 37.2–48.2 mm ), 4 ♀♀ ad. ( BL = 41.5, 46.2, 48.0, 48.9 mm ), 6 subad. , 11 imm. , 52 juv. ; same collection data as for preceding; supranet • 1 juv. ( BL = 4.7 mm , in separate vial); same collection data as for preceding; supranet • 1 ♀ imm. ( BL = 44.1 mm ); Drake Passage , N of South Shetland Islands , ANDEEP-I station 099-4; 61°06.41ʹ S , 59°16.55ʹ W to 61°06.24ʹ S, 59°16.79ʹ W; depth 5190.4– 5190.4 m ; 12 Feb. 2002 ; EBS supranet . Type locality and distribution In the original description, Willemoes-Suhm (1874) did not indicate which of the two potential localities near Crozet Island had yielded the new species. According to the station list of the Challenger Expedition ( Murray 1895 ), this species was encountered only at station 147, i.e., 46°16ʹ S , 48°27ʹ E between Marion Island and Crozet Island, bottom (= trawling) depth 1600 fathoms ( 2926 m ). This position is therefore regarded as the type locality. According to Hernández-Payán & Hendrickx (2020) and Daneliya (2023) this species is known from the Arctic, Atlantic, Mediterranean, Pacific and the Southern Ocean at depths of 728–7200 m . The ANDEEP records are within previously known distribution ranges.