Austroniscus Vanhoeffen 1914

• Main Authors: Kaiser, Stefanie, Brandt, Angelika
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2007
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Nannoniscidae; Austroniscus; Antarc*; Antarctica; Greenland; W. Antarctica; Weddell Sea
• Online Access: https://doi.org/10.5281/zenodo.5688737; http://treatment.plazi.org/id/038087A10A1E650D718999CD553AF827

Austroniscus Vanhoeffen, 1914 Synonymy: Nannoniscella Hansen, 1916: 84. Type species: Austroniscus ovalis Vanhoeffen, 1914 Diagnosis Body flattened and broadened; pereon and pleotelson expanded laterally in flat, marginal flanges. Rostral crest often well developed. Expansions of pereonites 1–4 anteriorly produced. Antennula generally with 6 articles ( A. chelus sp. nov. only with 7 articles), terminal article unspecialised. Pereopod 1 somewhat shorter and distally more robust than in pereopods 2–7; pereopods 5–7 not derived for swimming, with few natatory setae. Pleotelson without postlateral spines; without ventral spines on operculum or pereonites. Operculum rectangular, covering a small part of the ventral surface. Uropods short in relation to pleotelson, hardly projecting above posterior margin; uropods biramous, endo­ and exopodite almost of same length (modified after Hansen 1916, Siebenaller & Hessler 1981, Vanhoeffen 1914). Species composition (Table 1) Austroniscus acutus Birstein, 1970; Austroniscus chelus sp. nov.; Austroniscus coronatus Schiecke & Modigh Tota, 1976; Austroniscus groenlandicus (Hansen, 1916); Austroniscus karamani Birstein, 1963; Austroniscus norbi Svavarsson, 1982; Austroniscus obscurus sp. nov.; Austroniscus ovalis Vanhoeffen, 1914; Austroniscus rotundatus Vanhoeffen, 1914; Austroniscus vinogradovi Gurjanova, 1950. TABLE 1. Species composition and distribution of the genus Austroniscus Vanhoeffen, 1914. Species Locality Position Depth [m] Austroniscus acutus Birstein, 1970 Japan 44°48`N, 156°33`E 5005–6135 Austroniscus chelus sp. nov Weddell Sea, W.­ Antarctica 71°18.61`S, 013°56.12`E – 910–899.6 71°18.73`S, 013°56.12`E Austroniscus coronatus Schiecke & Modigh­ Gulf of Naples, Mediterra­ not specified 55–200 Tota, 1976 nean Austroniscus groenlandicus (Hansen, 1916) W.­ Greenland 64°03`N, not specified 10–132 Austroniscus karamani Birstein, 1963 E.­ Japan, N.­W. Pacific 37°54`N, 141°43.9`E 5005–5495 Material examined Holotype : 1 Ψ (preparatory, 2.4 mm), eastern Weddell ...