Leptostylis dentantipus Mühlenhardt-Siegel, 2016Holotype.Southern Ocean * • prep. ♀; Bellingshausen Sea, ANT XXVII/2 exped., FS Polarstern stat. PS 77-133; 61°30.33'S, 64°29.34'W [-61.5055, -64.489]; 3552 m depth; 11 January 2011; Ute Mühlenhardt-Siegel leg.; epibenthic sledge; ZMH -K-045831.Paratypes.* • 2 subA. ♂♂; Peninsula, ANDEEP I (ANT XIX/3) exped., FS Polarstern stat. PS 61/3-129-2; 59°52.55'S, 59°57.26'W [- 59.8702, - 59.9792; - 59.8691, - 59.9838]; 3631 [3643–3622] m depth; 23 February 2002; Angelika Brandt leg.; epibenthic sledge; one specimen dissected mounted on a permanent slide ZMH -K-045832. * • 6 m. + 3 prep. ♀♀; Western Weddell Sea, ANDEEP I (ANT XIX/3) exped., FS Polarstern stat. PS 61/3-046-7; 60°39.19'S, 53°56.85'W [- 60.6392, - 53.956; - 60.6354, - 53.9581]; 2889 [2894–2893] m depth; 30 January 2002; Angelika Brandt leg.; epibenthic sledge; all specimens damaged; ZMH -K-045833. * • subA. ♂ + prep. ♀; same data as ZMH -K-045833; ZMH -K-045834. * • 3 m. + prep. ♀; West Weddell Sea, ANDEEP II (ANT XIX/4) exped., FS Polarstern stat. PS 61/4-131-3; 65°19.19'S, 51°32.54'W [- 65.3305, - 51.527; - 65.3325, - 51.5235]; 3055 [3049–3050] m depth; 05 March 2002; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045835. * • 3 juv. + 3 prep. ♀♀; West Weddell Sea, ANDEEP II (ANT XIX/4) exped., FS Polarstern stat. PS 61/4-134-4; 65°19.71'S, 48°06.27'W [- 65.3201, - 48.0634; - 65.3192, - 48.0557]; 4059 [4066–4067] m depth; 09 March 2002; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045836. * • prep. ♀; W Weddell Sea, PS 61 ANDEEP II (ANT XIX/4) exped., FS Polarstern stat. PS 61/4-137-4; 63°46.33'S, 33°47.16'W [- 63.7499, - 33.7956; - 63.7464, - 33.7968]; 4978 [4976–4975] m depth; 14 March 2002; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045837. * • juv. ♂; Eastern Weddell Sea, PS 67 ANDEEP III (ANT XXII/3) exped., FS Polarstern stat. PS 67-078-9, 71°09.52'S, 14°0.76'W [- 71.16, - 14.000 8; -71.156, -13.980 2]; 2182 [2174–2147] m depth; 22 February 2005; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045838. * • 4 m. + juv. ♂ + ♂ + 2 ♀♀; Eastern Weddell Sea, ANDEEP III (ANT XXII/3) exped., FS Polarstern stat. PS 67-080-9; 70°38.45'S, 14°42.86'W [- 70.6513, - 14.7227; - 70.6537, - 14.7231]; 1178 [3103–3102] m depth; 23 February 2005; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045839. * • 2 juv. ♂♂ + prep. ♀ + juv. ♀; Eastern Weddell Sea, ANDEEP III (ANT XXII/3) exped., FS Polarstern stat. PS 67-081-8, 70°31.08'S, 14°34.82'W [- 70.5337, - 14.5842; - 70.5365, - 14.5855]; 4419 [4392–4385] m depth; 24 February 2005; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045840. * • prep. ♀; Southeast Weddell, ANT XV/3 exped., FS Polarstern stat. PS 48-89 -1; 73°27.26'S, 22°45.67'W [-73.45433, -22.76116]; 1650 m depth; 04 February 1998; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045841. * • prep. ♀; Southeast Weddell, ANT XV/3 exped., FS Polarstern stat. PS 48-107; 73°34.77'S, 22°38.29'W [- 73.58, - 22.64; -73.58166, -22.64833]; 938 [924–934] m depth; 06 February 1998; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045842. * • 1 m.; Southeast Weddell, ANT XV/3 exped., FS Polarstern stat. PS 48-145; 74°38.0'S, 27°11.0'W [- 74.63333, - 27.18333; - 74.63166, - 27.173333]; 1051 [1056–1061] m depth; 10 February 1998; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045843. * • subA. ♂ + prep. ♀; Southeast Weddell, ANT XV/3 exped., FS Polarstern stat. PS 48-272 -3; 71°28.76'S, 15°10.37'W [- 71.4783, - 15.17166; - 71.47833, - 15.17166]; 2077 m depth; 26 February 1998; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045844. * • 3 ♂♂ + 5 prep. ♀♀; S Sandwich Trench, Weddell Sea, ANDEEP II (ANT XIX/4) exped., FS Polarstern stat. PS 61/4-140-8; 58°15.21'S, 24°52.90'W [- 58.2663, - 24.8954; - 58.2688, - 24.8978]; 2965 [2947–2970] m depth; 22 March 2002; Angelika Brandt leg.; epibenthic sledge; all specimens damaged; ZMH -K-045845. * • 4 m.; same data as ZMH -K-045845; ZMH -K-045846. * • 2 m. + ♀; S Sandwich Trench, Weddell Sea, ANDEEP II (ANT XIX/4) exped., FS Polarstern stat. PS 61/4-141-10; 58°25.55'S, 25°0.22'W [- 58.418, - 25.0128; - 58.4156, - 25.0159]; 2369 [2313–2281] m depth; 23 March 2002; Angelika Brandt leg.; epibenthic sledge; ZMH -K-045847. * • ♀ + 3 prep. ♀♀; same data as holotype; ZMH -K-045848. * • 6 m. + 2 subA. ♂♂ + ♀ + 3 prep. ♀♀; Bellingshausen Sea, ANT XXVII/2 exped., FS Polarstern stat. PS 77-151; 62°32.63'S, 67°04.87'W [-62.543833, -67.081167]; 3698 m depth; 15 January 2011; Ute Mühlenhardt-Siegel leg.; epibenthic sledge; ZMH -K-045849. South Atlantic Ocean * • subA. ♂; E of Argentina, DIVA III exped., FS Meteor stat. M 79 / 1-532, 35°59.16'S, 49°0.75'W [- 35.986, - 49.0125; - 35.98733, - 49.01483]; 4605 [4604.5–4605.4] m depth; 15 July 2009; Pedro Martínez Arbizu leg.; epibenthic sledge; ZMH -K-045850. Southern Ocean * • ovig. ♀ + 2 prep. ♀♀; Bellingshausen Sea, ANT XXVII/2 exped., FS Polarstern stat. PS 77-167; 64°22.24'S, 70°39.33'W [-64.37066, -70.6555]; 3424 m depth; 19 January 2011; Ute Mühlenhardt-Siegel, leg.; epibenthic sledge; ZMH -K-045887. * • 2 ovig. ♀♀ + 2 prep. ♀♀; Western Weddell Sea, ANDEEP I (ANT XIX/3) exped., FS Polarstern stat. PS 61/3-046-7; 60°39.19'S, 53°56.85'W [- 60.6392, - 53.956; - 60.6354, - 53.9581]; 2889 [2894–2893] m depth; 30 January 2002; Angelika Brandt leg.; epibenthic sledge; one specimen dissected; ZMH -K-045888.Remarks.Mühlenhardt-Siegel (2016) reported additional paratypes deposited at the NMH; however, collection numbers were not given in the publication.Diagnosis.Carapace bulging, with acute teeth more or less in a row; distal end with hair-like setae. Antenna 1, accessory flagellum tri-articulated, as long as basal articles of main flagellum. Telson with one pair of cuspidate setae laterally on postanal part (after Mühlenhardt-Siegel 2016).Distribution.Southwest Atlantic and Southern Ocean, 938–4978 m depth.