A new species of Anobothrus (Polychaeta, Ampharetidae) from the Weddell Sea (Antarctica), with notes on habitat characteristics and an updated key to the genus Author Säring, Friederike 1C21E24A-79A8-4D67-B9BA-4C9F534E073F University of Rostock, Interdisciplinary Faculty, Department Maritime Systems, Albert-Einstein-Str. 21, D- 18059 Rostock, Germany. & University of Rostock, Institute of Biology, Marine Biology, Albert-Einstein-Str. 3, D- 18059 Rostock, Germany. friederike.saering@uni-rostock.de Author Bick, Andreas 3E678C85-D5E8-4A43-897D-A08E4D593602 University of Rostock, Institute of Biology, General and Systematic Zoology, Universitätsplatz 2, D- 18055 Rostock, Germany. bick-andreas@t-online.de Author Link, Heike 0D77C070-3BC1-406F-970F-59FF26386938 University of Rostock, Interdisciplinary Faculty, Department Maritime Systems, Albert-Einstein-Str. 21, D- 18059 Rostock, Germany. & University of Rostock, Institute of Biology, Marine Biology, Albert-Einstein-Str. 3, D- 18059 Rostock, Germany. heike.link@uni-rostock.de text European Journal of Taxonomy 2022 2022-02-01 789 130 152 http://dx.doi.org/10.5852/ejt.2022.789.1637 journal article 10.5852/ejt.2022.789.1637 0b526fe4-d4da-4a34-a837-4b35fcd4ad39 2118-9773 5965393 BE630DB7-6B9F-47E3-8A63-54CDF6ABC413

Table 1. Station list and sampling during RV Polarstern expeditions PS 81 (22 Jan.–18 Mar. 2013) around the Antarctic Peninsula (Drake Passage, Bransfield Strait, North-Western Weddell Sea) and PS 96 (6 Dec. 2015–4 Feb. 2016) to the South-Eastern Weddell Sea (South-Filchner Trough, North- Filchner Trough) with the abundance of Anobothrus konstantini Säring & Bick sp. nov. (No. of ind.) for each station. Sediment samples for environmental characterization were collected with the multicorer at the same stations (Säring et al. 2021a; Vanreusel et al. 2021a). Mean and standard deviation of environmental parameters are given for each station. Sediment parameters: Chl a = content of chlorophyll a; CPE = sum of chlorophyll a and phaeopigments; TOC% = total organic carbon; Silt & Clay % = grain size fraction <63 µm; Sand % = grain size fraction> 63 and <500 µm; Coarse Sand% = grain size fraction> 500 µm.

Region	Station no.	Date	Latitude	No.	Depth	Chl a	CPE	TOC%	Silt &	Sand%	Coarse
			Longitude	of	[m]	[µg g- 1 ]	[µg g- 1 ]		Clay%		Sand%
				ind.
Drake Passage	PS81-235 PS81-241	7 Mar. 2013 9 Mar.	62°16.35′ S 61°10.23′ W 62°6.60′ S	1 1	355 403	0.17 ± 0.15 0.16	2.08 ± 1.3 0.28	0.6 ± 0.0 0.8	90.3 ± 0.4 89.0	9.2 ± 0.4 7.0	0.4 ± 0.1 4.0
		2013	60°36.50′ W			± 0.06	± 0.1	± 0.0	± 3.5	± 1.3	± 4.9
	PS81-118	27 Jan.	62°26.93′ S	0	425	0.48	1.74	0.7	57.8	31.2	11.0
		2013	56°17.05′ W			± 0.00	± 0.2	± 0.0	± 10.0	± 2.1	± 7.9
Strait	PS81-202	27 Feb. 2013	62°56.00′ S 58°0.55′ W	0	757	0.92 ± 0.00	5.33 ± 1.7	1.1 ± 0.0	85.7 ± 0.3	14.0 ± 0.5	0.2 ± 0.3
Bransfield	PS81-217 PS81-218	2 Mar. 2013 2 Mar. 2013	62°53.25′ S 58°14.13′ W 62°56.94′ S 58°25.73′ W	2 0	532 688	0.31 ± 0.13 0.74 ± 0.00	1.42 ± 1.1 2.63 ± 2.0	0.4 ± 0.0 1.1 ± 0.0	38.2 ± 3.3 79.6 ± 4.3	43.1 ± 0.8 18.1 ± 2.3	18.7 ± 2.5 2.3 ± 2.1
	PS81-225	4 Mar.	62°56.08′ S	1	543	0.13	0.90	0.7	68.2	24.0	7.8
		2013	58°40.76′ W			± 0.11	± 0.9	± 0.0	± 3.0	± 0.7	± 2.3
North-Western Weddell Sea	PS81-120 PS81-162 PS81-163	28 Jan. 2013 10 Feb. 2013 11 Feb.	63°4.78′ S 54°31.45′ W 64°0.11′ S 56°44.43′ W 63°50.97′ S	0 0 0	494 223 517	9.31 ± 0.00 5.85 ± 0.00 25.20	18.27 ± 11.3 8.58 ± 2.8 38.12	1.1 ± 0.0 2.4 ± 0.0 1.6	84.0 ± 3.1 57.4 ± 1.3 91.9	15.8 ± 3.1 42.6 ± 1.3 8.1	0.3 ± 0.4 0.0 ± 0.0 0.0
		2013	56°25.24′ W			± 0.00	± 4.2	± 0.0	± 0.5	± 0.5	± 0.0
South Filchner Trough	PS96-037 PS96-061 PS96-072	16 Jan. 2016 21 Jan. 2016 24 Jan.	75°43.30′ S 42°27.71′ W 76°05.93′ S 30°18.23′ W 75°51.37′ S	0 1 1	391 468 755	0.33 ± 0.11 0.13 ± 0.03 0.19	4.41 ± 0.8 1.49 ± 0.1 2.88	0.4 ± 0.0 0.5 ± 0.1 0.5	77.7 ± 4.3 90.9 ± 2.1 79.7	20.1 ± 1.6 9.1 ± 2.1 19.1	2.2 ± 0.8 0.0 ± 0.0 1.2
		2016	32°17.44′ W			± 0.04	± 0.6	± 0.0	± 0.8	± 1.0	± 0.5
North Filchner Trough	PS96-017 PS96-026 PS96-048	4 Jan. 2016 8 Jan. 2016 18 Jan.	75°00.85′ S 32°52.51′ W 75°15.10′ S 37°54.85′ W 74°46.18′ S	4 1 0	608 415 482	0.06 ± 0.01 0.08 ± 0.06 0.15	0.83 ± 0.03 1.49 ± 1.1 2.14	0.2 ± 0.0 0.2 ± 0.1 0.3	43.4 ± 6.1 63.2 ± 19.2 66.8	49.1 ± 4.1 33.7 ± 16.3 30.3	7.5 ± 2.0 3.0 ± 2.9 2.9
		2016	35°20.91′ W			± 0.05	± 0.5	± 0.0	± 2.2	± 2.4	± 1.1