Sonnenemertes Chernyshev 2015

Sonnenemertes Chernyshev et al., 2015: 121.

Type species: Sonnenemertes cantelli Chernyshev et al., 2015, fixed by original designation.

Diagnosis: Given by Chernyshev et al. (2015: 121).

SONNENEMERTES CANTELLI CHERNYSHEV ET AL., 2015

Sonnenemertes cantelli Chernyshev et al., 2015: 121– 126, figs1C, D, 2A–N, 3A–H, 4A–G, 5A–I; Chernyshev & Polyakova, 2018: 122, figs 1C, 4C, D, 5.

Material sequenced: A tissue subsample from the holotype, MIMB 28684, 3 August 2012, about 400 km south of the Kamchatka Peninsula (46°13.69′– 46°14.87′N, 155°33.29′– 155°32.49′E), north-west Pacific, Agassiz trawl, 4869– 4861 m depth, station 2-11 of the KuramBio expedition with the S/ V Sonne, collected by A. V. Chernyshev.

Sequences: From the holotype: LC178609, 18S (1795 bp); LC178642, 28S (2094 bp); LC190963, COI (658 bp) (determined in this study). AB921565, 16S (505 bp), determined by Chernyshev et al. (2015), also from the holotype.

Distribution: Known from depths of 3306–4861 m around the Kuril Islands in the Sea of Okhotsk and the north-west Pacific (Chernyshev et al., 2015; Chernyshev & Polyakova, 2018).

Remarks: Sonnenemertes cantelli is ‘ 12–14 mm long, cylindrical and stout, with rounded anterior and posterior ends, without caudal cirrus; body yellowish in anterior part and pinkish in gut region’ (Chernyshev & Polyakova, 2018: 124). The species seems to feed on sipunculans (see Potential food items below).