Diastylis galtsevorum Mühlenhardt-Siegel & Lavrenteva, 2015 Holotype. North Pacific Ocean • prep. ♀; Kuril-Kamtschatka abyssal plains, KuramBIO exped., FS Sonne stat. SO 223-9 - 9; 40 ° 35.48 ' N, 150 ° 59.92 ' E to 40 ° 34.25 ' N, 150 ° 59.91 ' E [40.5915, 150.99867; 40.57083, 150.9985]; 5399–5408 [5398.9–5398.2] m depth; 23 August 2012; Angelika Brandt & Marina Malyutina leg.; epibenthic sledge; ZMH - K- 044229. Paratypes. * • 1 m. + subA. ♂ + 2 prep. ♀♀; Kuril-Kamtschatka-Trench, KuramBIO exped., FS Sonne stat. SO 223-2 - 10; 46 ° 13.56 ' N, 155 ° 33.57 ' E to 46 ° 14.99 ' N, 155 ° 32.63 ' E [46.22567, 155.55967; 46.24983, 155.544]; 4859–4863 [4862.4–4857.1] m depth; 03 August 2012; Angelika Brandt & Marina Malyutina leg.; epibenthic sledge; ZMH - K- 044230. * • 3 subA. ♀♀; Kuril-Kamtschatka-Trench, KuramBIO exped., FS Sonne stat. SO 223-5 - 9; 43 ° 35.48 ' N, 153 ° 57.88 ' E to 43 ° 34.3 ' N, 153 ° 58.16 ' E [43.59167, 153.96483; 43.57167, 153.96967]; 5376–5379 [5378.4–5376] m depth; 11 August 2012; Angelika Brandt & Marina Malyutina leg.; epibenthic sledge; one specimen dissected; ZMH - K- 044231. * • 1 m.; same data as ZMH - K- 044231; damaged specimen; ZMH - K- 044232. * • 2 prep. ♀♀; Kuril-Kamtschatka-Trench, KuramBIO exped., FS Sonne stat. SO 223-12 - 4; 39 ° 43.8 ' N, 147 ° 10.88 ' E to 39 ° 42.49 ' N, 147 ° 09.37 ' E [39.73, 147.169 33; 39.70817, 147.15617]; 5215–5228 [5223.7–5215.2] m depth; 31 August 2012; Angelika Brandt & Marina Malyutina leg.; epibenthic sledge; ZMH - K- 044252. Diagnosis. Carapace almost egg-shaped in dorsal view, with small and a few larger denticles, especially in the anterior part; 3 times longer than free thoracic segments; anteroventral margin with battlement-like crenulations; pseudorostrum short. Telson slightly shorter than uropod peduncle (after Mühlenhardt-Siegel and Lavrenteva 2015). Distribution. Northwest Pacific, Kurile Kamchatka plains, 4859–5429 m depth.

Published as part of Mercado-Salas, Nancy F., Mühlenhardt-Siegel, Ute, Pereira, Emanuel & Garilao, Cristina, 2026, An annotated type catalogue and a fully digitised Crustacea collection of the Museum of Nature Hamburg, Zoology. Part I: Crustacea, Malacostraca, Peracarida, Cumacea, pp. 137-193 in Evolutionary Systematics 10 (1) on pages 137-193, DOI: 10.3897/evolsyst.10.187593