Scolecodes rectus Kim & Boxshall 2020, sp. nov.

• Main Authors: Kim, Il-Hoi, Boxshall, Geoff A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Cyclopoida; Notodelphyidae; Scolecodes; Scolecodes rectus; Heard Island
• Online Access: https://doi.org/10.5281/zenodo.6422164; http://treatment.plazi.org/id/03C487CBED0D386AFCEFFB05FD84FC8F

Scolecodesrectus sp. nov. (Figs. 408, 409) Type material . Holotype ♀ (dissected and mounted on a slide, MNHN-IU-2014-21438) from Boltenia hirta Monniot C. & Monniot F., 1977 (Type MNHN-IT-2008-1485 = MNHN S2/BOL.A/7), SW of Heard Island (55°49.5’S, 69°35.7’E), depth 4200-4225 m, MNHN coll., 11 April 1974. Etymology . The name is derived from the Latin rect (=straight), alluding to the linear body of the female of the new species. Descriptionoffemale . Body (Fig. 408A) elongate, cylindrical, straight, consisting of prosome and small unsegmented abdomen: bodylength 6.21 mm; maximum body width 0.86 mm in middle of prosome. Cephalosome (Fig. 408B) small, articulated from metasome, narrowing anteriorly. Metasome with 4 original pedigerous somites defined by incomplete dorsal sutures.Anteriorpart of body from rostrum tolevel of leg 4 occupying about 30% of total body length; legs 1–4 separated by equal intervals. Fourth pedigeroussomiteexpandedposteriorly, incorporatingfifth pedigerous somite and forming brood pouch. Copulatory pore positioned on posteroventral surface of incorporated genitalsomite. Abdomen (Fig. 408C) small, unsegmented, longerthan wide (216×180 μm), not articulated from prosome, inserted into posteroventral surface of prosome. Caudal rami (Fig. 408D) about 2.8 times longerthan wide (125×45 μm), tapering in distal half, ornamented with scattered papillae: armed with 6 smallsetae (2 outer lateral plus 4 distal and subdistal). Rostrum (Fig. 408B) directed anteriorly, tapering. Antennule (Fig. 408C) unsegmented, consistingof greatly expanded, globular proximal part and narrow, digitiform distal part; armed with 4 setae on proximal part and about 8 setaeon distal part. Antenna (Fig. 408F) 3-segmented, consistingof short coxa, broad basis, and unsegmented endopod; basis slightly longerthan wide; endopod tapering, terminating in claw and bearing 1 outer and 4 inner smallsetae at base of claw. Labrum (Fig. 408G) simple, with slightly produced mid-region of free posterior margin. Mandible with coxa ...