Amblyops magnus Birstein & Tchindonova 1958

• Main Authors: Kou, Qi, Li, Xinzheng, He, Lisheng, Wang, Yong
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Mysida; Mysidae; Amblyops; Amblyops magnus; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.5984691; http://treatment.plazi.org/id/03D187E5FFF0FFC6FF6B184D95057EC9

Amblyops magnus Birstein & Tchindonova, 1958 (Figs 1–7) Birstein & Tchindonova 1958: 319–321, Fig. 36 (the Kurile-Kamchatka Trench, 49°23' N, 158°30' E, 7120–7260 m); Mauchline & Murano 1977: 46 (in checklist); Belyaev 1989: 189 (in checklist); Müller 1993: 75 (in checklist); Fukuoka 2009: 421–422, Fig. 9 (the Japan Trench, 37°00.6'–36°56.3' N 142°57.4'–142°58.9' E, 5000–5268 m, 41°22.1'–41°19.7' N 144°29.1'–144°24.6' E, 4480–4820 m); Murano 2012: 82–84 (key). Material examined. 1 adult female (carapace length 13 mm, total length ca. 35 mm), IDSSE Lab-2016- 0 616.001, Genbank accession number MF 062486, R/V 'Xiangyanghong 9', St. JL-Dive116-S11, the Mariana Trench, 10°57' N 141°56.3' E, 6555 m, collected by baited trap, coll. Y. Wang, 16 June 2016. Material for comparison. 1 adult female (total length 27.6 mm), NSMT-Cr 19673, R/V ‘ Soyo-maru’, St. S 007-04, off Onahama, Tohoku, Japan, 36°54.0'– 36°55.5' N 142°56.6' – 142°57.3' E, 5219–5268 m, collected by benthos net, 7 August 2007; 1 immature female (total length 20.6 mm), NSMT-Cr 19674, R/V ‘ Soyo-maru’, St. SO-SE Erimo, SE Erimo, Hokkaido, Japan, 41°22.1' –41°19.7' N 144°29.1'– 144°24.6' E, 4480–4820 m, collected by benthos net, 25 June 1992 (Fukuoka 2009). Description. (The present specimen, adult female, IDSSE Lab-2016-0616.001) Large-sized mysid shrimp with subcylindrical body form. Carapace (Figs 1a, b, 5a) of thin texture, soft, glabrous on surface; anterior margin evenly rounded, without distinct rostral projection, leaving most of eyeplates exposed; cervical groove and transverse groove behind eyeplates distinct; anterolateral corner slightly pointed in lateral view; posterior margin emarginate, exposing last two thoracic somites dorsally. Eyes (Figs 1a–d, 5a) plate-like without visual elements, separated from each other, almost reaching to distal margin of first segment of antennular peduncle; lateral margin about 3 times as long as mesial margin, maximum width about 1.9 times as length of lateral margin; sub-equilateral triangular process ...