After Nelson, 1994, and Albert & Crampton, 2005, with Recent species from Froese & Pauly, 2001 [“The Fishbase”]

<==o Rhamphichthyidae (kärsäveitsikalat) [N: 2/4-6] [FB: 2/14]
   |--o Rhamphichthys Müller & Troschel, 1848 [N: 1-3] [FB: 10]
   |  |-- R. apurensis (Fernández-Yépez, 1968)
   |  |-- R. atlanticus Triques, 1999
   |  |-- R. drepanium Triques, 1999
   |  |-- R. hahni (Meinken, 1937)
   |  |-- R. lineatus Castelnau, 1855
   |  |-- R. longior Triques, 1999
   |  |-- R. marmoratus Castelnau, 1855
   |  |-- R. pantherinus Castelnau, 1855
   |  |-- R. rostratus (Linnaeus, 1766)
   |  `-- R. schomburgki Kaup, 1856
   `--+--o Gymnorhamphichthys Ellis, 1912 [N: 3] [FB: 4]
      |  |-- G. caianus (Triques, 1996) [=? Iracema]
      |  |-- G. hypostomus Ellis, 1912
      |  |-- G. rondoni (Miranda-Ribeiro, 1920)
      |  `-- G. rosamarie Schawssmann, 1989
      `--o Iracema Triques, 1996b [not recognized by the Fishbase]
         |-- I. sp. [Albert & Crampton]
         `-- I. sp. [Ferraris, 2003]

Reference(s):