n = 14
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Sewellia albisuera | Freyhof, 2003 | Sewellia albisuera | Gastromyzontidae | |
| Sewellia analis | Nguyen & Nguyen, 2005 | Sewellia analis | Gastromyzontidae | |
| Sewellia breviventralis | Freyhof & Serov, 2000 | Sewellia breviventralis | Gastromyzontidae | |
| Sewellia diardi | Roberts, 1998 | Sewellia diardi | Gastromyzontidae | |
| Sewellia elongata | Roberts, 1998 | Sewellia elongata | Gastromyzontidae | |
| Sewellia hypsicrateae | Endruweit & Nguyen, 2016 | |||
| Sewellia lineolata | (Valenciennes, 1846) | Sewellia lineolata | Gastromyzontidae | |
| Sewellia marmorata | Serov, 1996 | Sewellia marmorata | Gastromyzontidae | |
| Sewellia medius | Nguyen & Nguyen, 2005 | Sewellia medius | Gastromyzontidae | |
| Sewellia patella | Freyhof & Serov, 2000 | Sewellia patella | Gastromyzontidae | |
| Sewellia pterolineata | Roberts, 1998 | Sewellia pterolineata | Gastromyzontidae | |
| Sewellia songboensis | Nguyen & Nguyen, 2005 | Sewellia songboensis | Gastromyzontidae | |
| Sewellia speciosa | Roberts, 1998 | Sewellia speciosa | Gastromyzontidae | |
| Sewellia trakhucensis | Nguyen & Nguyen, 2005 | Sewellia trakhucensis | Gastromyzontidae |