Cerviniella arctica Kihara & Arbizu, 2012, sp. nov.

• Main Authors: Kihara, Terue C., Arbizu, Pedro Martínez
• Format: Other/Unknown Material
• Language: unknown
• Published: 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Harpacticoida; Cerviniidae; Cerviniella; Cerviniella arctica; Arctic; Arctic Ocean; Laptev Sea; laptev
• Online Access: https://zenodo.org/record/5616007; https://doi.org/10.5281/zenodo.5616007

Cerviniella arctica sp. nov. (Figs 6 C–E, 7 –10, 18– 19) Type locality. Arctic Ocean, Laptev Sea (78 ° 23.19 ' N, 133 ° 11.43 ' E), 2019 m depth. Type material. Holotype female dissected on 14 slides (reg. no. SMF 37030) from station PS 27 #035/ 2457 - 1, multi corer 5, collected 04/09/ 1993. Material collected from the type locality by the junior author during the Expedition ARCTIC’ 93, Leg ARK-IX/ 4 of RV Polarstern. Description. FEMALE. Total body length 1014.7 μm. Largest width measured at posterior border of cephalic shield: 352.9 μm. Body (Figs 6 C, 18 A–C) with no clear distinction between prosome and urosome, body somites gradually tapering posteriorly. Prosome (Figs 6 C, 18 A–C) 4 -segmented, with first pedigerous somite incorporated into cephalothorax. Cephalothorax covered by minute scales (Fig. 6 C); cuticle with anastomosing pattern near the rostrum (Fig. 19 E) and along margins (Figs 6 C, 18 A–B); additional ornamentation consisting of sensilla and pores as illustrated in Figure 6 C; posterior margin smooth. Pedigerous somites with reticulation along posterior margins and ornamentation consisting of sensilla as illustrated in Figure 6 C; epimera of second to fourth pedigerous somites expanded posteriorly; posterior margins serrate. Urosome (Figs 6 C, 7 A–B, 18 A–C) 5 -segmented, comprising P 5 -bearing somite, genital double-somite, 2 free abdominal somites and anal somite. Urosomites with surface ornamentation consisting of sensilla and reticulation as shown in Figures 7 A–B; posterior margin serrate. Genital double-somite (Figs 6 C, 7 A–B, 18 A–B) original segmentation indicated by transverse, serrate surface ridge with reticulation and sensilla dorsally, and hook-like projections laterally (Figs 19 B–F), completely fused ventrally; genital field (Fig. 7 C) with surface striations, copulatory pore located in median depression; gonopores covered by opercula derived from sixth legs and by anteriorly directed flap arising from somite wall; P 6 bearing 2 naked setae. Anal somite (Figs 6 C, 7 A–B, 18 ...