Sabatieria chukchensis sp. n. (Figures 2–4, Tables 1–2) Type material. Five males and two females were collected from station CC 1. Holotype: ♂ 1 on slide number Chukchi20100720 CC14205. Paratypes: ♂ 2 on slide number Chukchi20100720 CC14203, ♂ 3 on Chukchi20100720 CC14201, ♂ 4 on Chukchi20100720 CC14206, ♂ 5 on Chukchi20100720 CC14208, ♀ 1 on Chukchi20100720 CC14203, ♀ 2 on Chukchi20100720 CC14212. Type locality and habitat. All specimens were collected from the Chukchi Sea (52 m water depth). Station CC 1: 67.6722°N, 168.9562°W. Median grain diameter: 5.35 Md Φ, Sand: 33.34%, Silt: 58.02%, Clay: 8.63%. Etymology. This species is named after the Chukchi Sea, the type locality. Measurements. Table 1. Description. Male. Body cylindrical, tapering slightly towards both extremities. Cuticle with transverse rows of dots, lateral differentiation consisting of larger, irregularly-spaced dots. Three crowns of anterior sensilla: six inner labial papillae, six short but distinct outer labial setae and four short cephalic setae. Anterior portion of buccal cavity cup-shaped, posterior portion narrow. Amphideal fovea spiral with 2.75–3.25 turns, located immediately posterior to cephalic setae. Two pairs of ventro-sublateral cervical setae are located just posterior to amphideal fovea. Two lateroventral rows of somatic setae in precloacal region. Pharynx gradually swelling towards posterior, not forming true bulb. Nerve ring 102–136 µm from anterior end of body, at 45–59% of the pharyngeal region length. Excretory pore 123–142 µm from anterior end of body, at 54–62% of the pharyngeal region length. Tail 142–172 µm long, conico-cylindrical and with short cylindrical part. Four rows of sparse short caudal setae and three short terminal setae present. Reproductive system diorchic, with outstretched testes. Anterior testis to the left of intestine, posterior testis to the right of intestine. Spicules paired, equal, arcuate, equal to 1.2–1.6 cloacal body diameters in length, proximal part of spicule is broader and with central ...