n = 31
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Brachyhypopomus alberti | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus alberti | Hypopomidae | |
| Brachyhypopomus arrayae | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus arrayae | Hypopomidae | |
| Brachyhypopomus batesi | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus batesi | Hypopomidae | |
| Brachyhypopomus beebei | (Schultz, 1944) | Brachyhypopomus beebei | Hypopomidae | |
| Brachyhypopomus belindae | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus belindae | Hypopomidae | |
| Brachyhypopomus benjamini | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus benjamini | Hypopomidae | |
| Brachyhypopomus bennetti | Sullivan, Zuanon & Cox Fernandes, 2013 | Brachyhypopomus bennetti | Hypopomidae | |
| Brachyhypopomus bombilla | Loureiro & Silva, 2006 | Brachyhypopomus bombilla | Hypopomidae | |
| Brachyhypopomus brevirostris | (Steindachner, 1868) | Brachyhypopomus brevirostris | Hypopomidae | Bluntnose knifefish |
| Brachyhypopomus bullocki | Sullivan & Hopkins, 2009 | Brachyhypopomus bullocki | Hypopomidae | |
| Brachyhypopomus cunia | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus cunia | Hypopomidae | |
| Brachyhypopomus degy | Dutra, Peixoto, Ochoa, Ohara, de Santana, Menezes & Datovo, 2021 | Brachyhypopomus degy | Hypopomidae | |
| Brachyhypopomus diazae | (Fernández-Yépez, 1972) | Brachyhypopomus diazae | Hypopomidae | |
| Brachyhypopomus diazi | (Fernández-Yépez, 1972) | Brachyhypopomus diazae | Hypopomidae | |
| Brachyhypopomus draco | Giora, Malabarba & Crampton, 2008 | Brachyhypopomus draco | Hypopomidae | |
| Brachyhypopomus elegans | (Steindachner, 1880) | Steatogenys elegans | Hypopomidae | Barred knifefish |
| Brachyhypopomus flavipomus | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus flavipomus | Hypopomidae | |
| Brachyhypopomus gauderio | Giora & Malabarba, 2009 | Brachyhypopomus gauderio | Hypopomidae | |
| Brachyhypopomus hamiltoni | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus hamiltoni | Hypopomidae | |
| Brachyhypopomus hendersoni | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus hendersoni | Hypopomidae | |
| Brachyhypopomus janeiroensis | (Costa & Campos-da-Paz, 1992) | Brachyhypopomus janeiroensis | Hypopomidae | |
| Brachyhypopomus jureiae | Triques & Khamis, 2003 | Brachyhypopomus jureiae | Hypopomidae | |
| Brachyhypopomus menezesi | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus menezesi | Hypopomidae | |
| Brachyhypopomus occidentalis | (Regan, 1914) | Brachyhypopomus occidentalis | Hypopomidae | |
| Brachyhypopomus palenque | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus palenque | Hypopomidae | |
| Brachyhypopomus pinnicaudatus | (Hopkins, 1991) | Brachyhypopomus pinnicaudatus | Hypopomidae | |
| Brachyhypopomus provenzanoi | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus provenzanoi | Hypopomidae | |
| Brachyhypopomus regani | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus regani | Hypopomidae | |
| Brachyhypopomus sullivani | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus sullivani | Hypopomidae | |
| Brachyhypopomus verdii | Crampton, de Santana, Waddell & Lovejoy, 2017 | Brachyhypopomus verdii | Hypopomidae | |
| Brachyhypopomus walteri | Sullivan, Zuanon & Cox Fernandes, 2013 | Brachyhypopomus walteri | Hypopomidae |