Microstomatidae
Microstomatidae | ||||||||||||
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Nansenia groenlandica |
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Microstomatidae | ||||||||||||
Bleeker , 1859 |
The Microstomatidae ( Greek mikros , small, stoma , mouth) are a family of golden salmon-like (Argentiniformes). The fish, known as “pencil smelts” in English, live pelagically in the Atlantic , Indian and Pacific , especially in tropical and subtropical regions.
features
The fish, which are 8.5 to 26.5 centimeters long, are elongated, usually dark in color and in most cases have large eyes and small mouths. It is characteristic that the eyes have twice the diameter of the mouth length. The postcleithra, a bone in the shoulder girdle, is present, the mesocoracoid is absent. The fins are without hard rays, the dorsal fin clearly behind the middle of the body. An adipose fin is usually present. The pectoral fins sit on the side. The fish have 41 to 50 vertebrae and 3 to 4 gill trap rays . The lateral line organ and accompanying scales extend to the tail.
- Fin formula : dorsal 9–12, anal 7–10, pectoral 7–14, ventral 8–12.
Systematics
There are three genera and 21 species:
- Genus Microstoma (2 species)
- Microstoma australis Gon & Stewart, 2014
- Microstoma microstoma ( Risso , 1810)
- Genus Nansenia (18 species)
- Nansenia ahlstromi Kawaguchi & Butler, 1984
- Nansenia antarctica Kawaguchi & Butler, 1984
- Nansenia ardesiaca Jordan & Thompson, 1914
- Nansenia atlantica Blache & Rossignol, 1962
- Nansenia boreacrassicauda Poulsen, 2015
- Nansenia candida Cohen, 1958
- Nansenia crassa Lavenberg, 1965
- Nansenia groenlandica (Reinhardt, 1840)
- Nansenia iberica Matallanas, 1985
- Nansenia indica Kobyliansky, 1992
- Nansenia longicauda Kawaguchi & Butler, 1984
- Nansenia macrolepis (Gilchrist, 1922)
- Nansenia megalopa Kawaguchi & Butler, 1984
- Nansenia oblita (Facciolà, 1887)
- Nansenia obscura Kobyliansky & Usachev, 1992
- Nansenia pelagica Kawaguchi & Butler, 1984
- Nansenia tenera Kawaguchi & Butler, 1984
- Nansenia tenuicauda Kawaguchi & Butler, 1984
- Genus Xenophthalmichthys (monotypic)
- Xenophthalmichthys danae Regan , 1925
Individual evidence
- ^ A b Jan Yde Poulsen: A new species of pencil smelt Nansenia boreacrassicauda (Microstomatidae, Argentiniformes) from the North Atlantic Ocean. Zootaxa, 4020, 3, pp. 517-532, September 2015 doi : 10.11646 / zootaxa.4020.3.6
- ↑ Microstomatidae Bleeker, 1859 . In: R. Froese and D. Pauly, (Eds.): FishBase , accessed through World Register of Marine Species , 2015, accessed September 24, 2015
literature
- Joseph S. Nelson : Fishes of the World , John Wiley & Sons, 2006, ISBN 0-471-25031-7
Web links
- Microstomatidae on Fishbase.org (English)