Leptostylis abyssalis Mühlenhardt-Siegel, 2019Holotype.North Atlantic Ocean • ♂; Puerto Rico Trench, Vema-TRANSIT exped., FS Sonne stat. SO 237-14-2; 19°04.55'N, 67°07.86'W [19.07583, - 67.131; 19.07783, - 67.1295]; 4925–4934 [4935.4–4928.3] m depth; 24 January 2015; Angelika Brandt leg.; epibenthic sledge; ZMH -K-046129.Paratypes.* • 1 m.; Puerto Rico Trench, Vema-TRANSIT exped., FS Sonne stat. SO 237-14-1; 19°02.08'N, 67°09.44'W [19.03467, - 67.15733; 19.03517, - 67.157]; 4552 [4918.9–4921.1] m depth; 24 January 2015; Nils Brenke leg.; epibenthic sledge; ZMH -K-046130. * • ♂; same data as ZMH -K-046130; specimen dissected mounted on permanent slide; ZMH -K-046131.Diagnosis.Carapace slightly depressed, 2.1 times as long as free thoracic segments, no dorsomedial serration, battlement-like crenelated crest laterally. Pleonite 6 elongated, but shorter than pleonite 4 (Mühlenhardt-Siegel 2019).Distribution.Northwest Atlantic, Puerto Rico Trench, 4552–4934 m depth.