| Nominal Species (n = 23) | Present allocation (n = 17) | Ref. |
|---|---|---|
| Gymnorhamphichthys apurensis Fernández-Yépez, 1968 | Rhamphichthys apurensis | 26457 |
| Rhamphichthys atlanticus Triques, 1999 | Rhamphichthys atlanticus | 35403 |
| Rhamphichthys blochii Kaup, 1856 | Rhamphichthys rostratus | 36685 |
| Gymnorhamphichthys bogardusae Lundberg, 2005 | Gymnorhamphichthys bogardusae | 120919 |
| Gymnorhamphichthys britskii Carvalho, Ramos & Albert, 2011 | Gymnorhamphichthys britskii | 87956 |
| Iracema caiana Triques, 1996 | Iracema caiana | 36685 |
| Rhamphichthys drepanium Triques, 1999 | Rhamphichthys drepanium | 35403 |
| Sternarchorhamphus hahni Meinken, 1937 | Rhamphichthys hahni | 36685 |
| Rhamphichthys heleios Carvalho & Albert, 2015 | Rhamphichthys heleios | 99943 |
| Gymnorhamphichthys hypostomus Ellis, 1912 | Gymnorhamphichthys hypostomus | 26457 |
| Gymnorhamphichthys hypostomus petiti Géry & Vu, 1964 | Gymnorhamphichthys petiti | 36685 |
| Gymnorhamphichthys hypostomus petiti (non Géry & Vu-Tân-Tuê, 1964) | Gymnorhamphichthys rondoni | 36685 |
| Rhamphichthys lineatus Castelnau, 1855 | Rhamphichthys lineatus | 26457 |
| Rhamphichthys longior Triques, 1999 | Rhamphichthys longior | 35403 |
| Gymnotus longirostratus Lacepède, 1800 | Rhamphichthys rostratus | 36685 |
| Rhamphichthys marmoratus Castelnau, 1855 | Rhamphichthys marmoratus | 26457 |
| Rhamphichthys pantherinus Castelnau, 1855 | Rhamphichthys pantherinus | 26457 |
| Rhamphichthys reinhardti Kaup, 1856 | Rhamphichthys rostratus | 35403 |
| Urumara rondoni Miranda Ribeiro, 1920 | Gymnorhamphichthys rondoni | 26457 |
| Gymnorhamphichthys rosamariae Schwassmann, 1989 | Gymnorhamphichthys rosamariae | 36685 |
| Gymnotus rostratus Linnaeus, 1766 | Rhamphichthys rostratus | 35403 |
| Rhamphichthys schneideri Kaup, 1856 | Rhamphichthys rostratus | 36685 |
| Rhamphichthys schomburgki Kaup, 1856 | Rhamphichthys rostratus | 36685 |