Austroniscus Vanhoeffen 1914
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 ante...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2007
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| Online Access: | https://zenodo.org/record/5688737 https://doi.org/10.5281/zenodo.5688737 |
| Summary: | 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), ... |
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