n = 22
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Nansenia ahlstromi | Kawaguchi & Butler, 1984 | Nansenia ahlstromi | Microstomatidae | |
| Nansenia antarctica | Kawaguchi & Butler, 1984 | Nansenia antarctica | Microstomatidae | |
| Nansenia ardesiaca | Jordan & Thompson, 1914 | Nansenia ardesiaca | Microstomatidae | Robust smallmouth |
| Nansenia atlantica | Blache & Rossignol, 1962 | Nansenia atlantica | Microstomatidae | |
| Nansenia boreacrassicauda | Poulsen, 2015 | Nansenia boreacrassicauda | Microstomatidae | |
| Nansenia candida | Cohen, 1958 | Nansenia candida | Microstomatidae | Bluethroat argentine |
| Nansenia crassa | Lavenberg, 1965 | Nansenia crassa | Microstomatidae | Stout argentine |
| Nansenia groenlandica | (Reinhardt, 1840) | Nansenia groenlandica | Microstomatidae | Greenland argentine |
| Nansenia iberica | Matallanas, 1985 | Nansenia iberica | Microstomatidae | |
| Nansenia indica | Kobyliansky, 1992 | Nansenia indica | Microstomatidae | |
| Nansenia longicauda | Kawaguchi & Butler, 1984 | Nansenia longicauda | Microstomatidae | |
| Nansenia macrolepis | (Gilchrist, 1922) | Nansenia macrolepis | Microstomatidae | |
| Nansenia megalopa | Kawaguchi & Butler, 1984 | Nansenia megalopa | Microstomatidae | |
| Nansenia oblita | (Facciolà, 1887) | Nansenia oblita | Microstomatidae | |
| Nansenia obscura | Kobyliansky & Usachev, 1992 | Nansenia obscura | Microstomatidae | |
| Nansenia pelagica | Kawaguchi & Butler, 1984 | Nansenia pelagica | Microstomatidae | |
| Nansenia problematica | Lloris & Rucabado, 1985 | Bathylagichthys problematicus | Bathylagidae | |
| Nansenia robusta | Abe, 1976 | Nansenia ardesiaca | Microstomatidae | Robust smallmouth |
| Nansenia sanrikuensis | Kanayama & Amaoka, 1983 | Nansenia candida | Microstomatidae | Bluethroat argentine |
| Nansenia tanakai | Schmidt, 1918 | Nansenia ardesiaca | Microstomatidae | Robust smallmouth |
| Nansenia tenera | Kawaguchi & Butler, 1984 | Nansenia tenera | Microstomatidae | |
| Nansenia tenuicauda | Kawaguchi & Butler, 1984 | Nansenia tenuicauda | Microstomatidae |