Spiophanes pacificus Meissner & Schwentner & Göưing & Fiege 2023, sp. nov.

• Main Authors: Meissner, Karin, Schwentner, Martin, Göưing, Miriam, Fiege, Thomas Knebelsberger and Dieter
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Spionida; Spionidae; Spiophanes; Spiophanes pacificus; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.10497562; http://treatment.plazi.org/id/743EE917FFEEFF95FF9E24D11961FBCC

Spiophanes pacificus sp. nov. Meissner, Schwentner and Fiege (Figs 13–15; Table 6) Spiophanes sp. NHM_1897 Neal et al ., 2022: 42–43, fig. 40a—d, table 1. Type material: Holotype . NW Pacific Ocean , Kuril-Kamchatka trench, SO 223 (KuramBio), stn 4-5 BC, 5766 m, 7 Aug 2012, complete specimen (68 chaetigers, nearly 16 mm long, width 0.72 mm), now preserved in 70% EtOH (ZMH-P 30460). Paratypes: NW Pacific Ocean , Kuril-Kamchatka trench, SO 223 (KuramBio), stn 2-10 EBS Epi, 4859 m, 3 Aug 2012, one af (ZMH-P 30453); stn 5-5 BC, 5379 m, 10 Aug 2012, four af (SMF 32272); stn 5-10 EBS Epi, 5375 m, 11 Aug 2012, 1af (SMF 30593). SE Pacific Ocean , Peru Basin (DISCOL Experimental Area, DEA), SO 242 (JPIO-DISCOL 1), stn 85-4 EBS, 4147 m, 14 Aug 2015, one af (SMF 30610). Measurements for largest paratype from the Kuril-Kamchatka trench (SMF 32272): af of about 21 chaetigers, length ~ 5.5 mm, width ~ 0.6 mm. Largest paratype from the Peru Basin (SMF 30610): af of about 21 chaetigers, length 4.1 mm, width 0.9 mm (chaetae omiưed). Non– type material: NW Pacific Ocean , Kuril-Kamchatka trench, SO 223 (KuramBio), stn 2-2, 5247.1 m (ZMH-P 28455); stn 3-4, 4987.7 m (ZMH-P28445, ZMH-P28446, ZMH-P28447); stn 4-4, 5773.6 m (ZMH-P28451); stn 4-5, 5766 m (SMF 32273). SE Pacific Ocean , Peru Basin (DISCOL area), SO 242 (JPIO-DISCOL 1), Reference area Hill NW, stn 117-7 EBS, 4154 m, 19 Aug 2015, one af (SMF 30612, SEM 1336); reference area S, stn 45-2 EBS, 4184 m, 4 Aug 2015, two af (SMF 30616, SEM 1324). – for details and additional specimens see the Supporting Information, Table S2. Description: Holotype complete specimen with 68 chaetigers, 0.72 mm wide and nearly 16 mm long (Fig. 14A, B). Examined specimens between 0.3 and 0.9 mm in width, except for the holotype all anterior fragments. Body slender, subcylindrical. Prostomium bell-shaped with straight anterior margin extending into short anterolateral projections (Fig. 14B, C), short stout cirriform occipital antenna with rounded tip present (Fig. 14C, E). Dorsal ciliated organs ...