Brodskius arcticus Andronov & Kosobokova, 2011, sp. nov.

• Main Authors: Andronov, Vladimir N., Kosobokova, Ksenia N.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Calanoida; Scolecitrichidae; Brodskius; Brodskius arcticus; Arctic; canada basin
• Online Access: https://doi.org/10.5281/zenodo.6182130; http://treatment.plazi.org/id/03E087DD6D58DE771D8EFBEB222BE329

Brodskius arcticus sp. nov. (Figures 1–2) Material examined. Holotype: adult female, dissected. ZIN accession number 91095. Collected during the USCGC “ Healy ”, Ocean Exploration-05/2 cruise, station 5, Canada Basin (73° 24’N, 153° 33’W), 24 June 2005, bottom depth 3850 m, depth of collection 2000– 1000 m. Species description. Adult female of total length 1.04 mm with elliptical prosome nearly 4.5 times longer than urosome, dorsal prosome length to width ratio 2.46 (Fig. 1: 1, 2). Rostrum without filaments (Fig. 1: 4, 5). Cephalosome and pediger one not completely separated; fourth and fifth pedigers separate. Posterior corners of prosome significantly indented in lateral view (Fig. 1: 2). Genital double somite symmetrical, with elongate spermathecae (Fig. 1: 1, 6, 7). Antennule (Fig. 1: 2) of typical structure for genus, slightly longer than prosome, consisting of 24 expressed segments. Antenna (Fig. 1: 3): coxa and basis lacking setae; first endopodal segment with one seta, second endopodal segment compound, with 11 setae; exopod consisting of seven segments with setal formula 0.1.1.1.1.0.3. Mandible (Fig. 1: 8–10): gnathobase elongate, narrow; cutting edge narrow with deep incision. Exopod of five segments, with setal formula 1.1.1.1.1; first endopod segment with one seta, second endopod segment with nine setae. Maxillule (Fig. 1: 11): praecoxal endite with nine terminal and two posterior setae; coxal endite with two setae, coxal epipodite with six setae; proximal basal endite with two setae, one longer and thicker than other; distal basal endite fused to endopod with nine setae in total, two of them longer and thicker; exopod with two setae. Maxilla (Fig. 1: 12): proximal praecoxal endite with four setae, distal with three setae; proximal and distal coxal endites with three and two setae; proximal basal endite with three setae of different appearance: first wormlike, second thicker than others and heavily setulate, third of typical shape; distal basal endite plus endopod with one sclerotized seta and eight ...