Bradyidius kurilokamchaticus Markhaseva & Renz 2021, sp. nov.

• Main Authors: Markhaseva, Elena L., Renz, Jasmin
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Calanoida; Aetideidae; Bradyidius; Bradyidius kurilokamchaticus; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.5757670; http://treatment.plazi.org/id/03E73B78FFFBFFDCFF0C60D178D5C226

Bradyidius kurilokamchaticus sp. nov. (Figs 7–9) Holotype . Adult female, dissected, body length 2.50 mm. SMF 37268/1-3 (slides) and 37269 (vial) (Senckenberg). Collected above the sea bed in the Pacific Ocean, Kurile-Kamchatka Trench at Sta. 2–10, 46° 14.76’ N 155° 32.81’ E, on 3 August 2012 by the KuramBio 1 expedition, Sonne cruise SO 223, at a depths of 4859 m. Paratype . One adult female, partly dissected, body length 2.55 mm. ZIN, 91151. Collected above the sea bed in the Kurile-Kamchatka Trench at Sta. 9–12, 40°34.49’ N 150°59.85’ E on 24 August 2012 by the KuramBio 1 expedition, Sonne cruise SO 223, at a depth of 5399 m. Additional material . One adult female in a very poor condition, dissected, body length 2.40 mm, same label data as for the holotype. Description . Female. Body length 2.40–2.55 mm. Prosome 4.02 times as long as urosome (Fig. 7A–B). Rostrum two-pointed, not divergent in holotype (Fig. 7C, E), abnormal in paratype (Fig. 7D, F). Cephalosome and pedigerous somite 1 and pedigerous somites 4–5 incompletely separate; posterior corners prolonged into short points, reaching the posterior third of the genital double-somite (Fig. 7A–B, G–J). Urosome of 4 somites. Genital double-somite symmetrical, with lateral swellings in its anterior half (dorsal view) (Fig. 7G–J). Spermathecae narrow-elongate and oval (holotype), or oval-widened in the distal part (Fig. 7G, I). Caudal rami with 1 lateral seta, 1 ventral seta, and 4 terminal setae (Fig. 7G–J). Antennule broken in all specimens, armature of the ancestral segment I as: 3s in holotype and 2s in paratype, armature of retained ancestral segments from II to XIV given after holotype and of ancestral segments XV–XVII after paratype as follows: II–IV–6s+1ae, V –2s+1ae, VI–2s, VII–2s+1ae, VIII and IX–2s each, X–XI–4s, XII and XIV–2?, XV–1s+1?, XVI–2s+1ae, XVII–1s+1?. Antenna (Fig. 8A), after holotype, coxa with 1 seta, basis with 2 setae; exopod of 8 segments, setation formula 1,1-1-1, 1, 1, 1, 1, 1, and 3 setae, endopod segment 1 with 2 setae, endopod ...