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| No. | Valid Name | Author | English Name |
| 1. | Gymnorhamphichthys bogardusae | Lundberg, 2005 | |
| 2. | Gymnorhamphichthys britskii | Carvalho, Ramos & Albert, 2011 | Drop Knifefish |
| 3. | Gymnorhamphichthys hypostomus | Ellis, 1912 | Morse Knifefish |
| 4. | Gymnorhamphichthys petiti | Géry & Vu, 1964 | |
| 5. | Gymnorhamphichthys rondoni | (Miranda Ribeiro, 1920) | Mousetail knifefish |
| 6. | Gymnorhamphichthys rosamariae | Schwassmann, 1989 | Sand knifefish |