After Langer & Schultz, 2000, Hone & Benton, 2008, Langer, Montefeltro, Hone, Whatley & Schultz, 2010, and Ezcurra, Montefeltro & Butler, 2016

<==o †Rhynchosauria Osborn, 1903 (rhynchosaurs; rynkosaurit)
   |?- †Noteosuchus colletti (Watson, 1912) Broom, 1925 [Eosuchus colletti Watson, 1912] [preoccupied by Eosuchus lerichei Dollo, 1907, a gavialoid crocodylian]
   |-- †Mesosuchus browni Watson, 1912; E.Trias. SAf. [Mesosuchinae]
   `--+-- †Howesia browni Broom, 1905; E.Trias. SAf.
      `--+-- †Eohyosaurus wolvaardti Butler, Ezcurra, Montefeltro, Samathi & Sobral, 2015; M.Trias. SAf.
         `--o †Rhynchosauridae sensu Butler et al., 2015 [incl. Hyperdapedontidae Lydekker, 1885]
            |?- †Eifelosaurus triadicus Jaekel, 1904; E.Trias. Eu.
            |?- †Mesodapedon kuttyi Chatterjee, 1980; L.Trias. SAs.
            |--o †Rhynchosaurinae
            |  `-- †Rhynchosaurus articeps Owen, 1841; M.-L.Trias.
            `--o †Hyperdapedontidae (Lydekker, 1885) Langer, Montefeltro, Hone, Whatley & Schultz, 2010 [Hyperdapedontinae Chatterjee, 1969]
               `--+-- †Langeronyx brodiei (Benton, 1990) Ezcurra, Montefeltro & Butler, 2016 [Rhynchosaurus brodiei Benton, 1990]
                  `--+--o †Stenaulorhynchinae sensu Ezcurra, Montefeltro & Butler, 201
                     |  |-- †Stenaulorhynchys stockleyi (Haughton, 1932) Huene, 1938 [Hyperodepedon stockleyi; Scaphonyx stockleyi; Supradapedon stockleyi] M.Trias. EAf.
                     |  `-- “Mariante rhynchosaur”
                     `--+-- †Bentonyx sidensis Langer, Montefeltro, Hone, Whatley & Schultz, 2010
                        `--+-- †Fodonyx spenceri (Benton, 1990) Hone & Benton, 2008 [Rhynchosaurus spenceri Benton, 1990]
                           `--+-- †Ammorhynchus navajoi Nesbitt & Whatley, 2004; M.Trias. SWNAm.
                              `--o †Hyperdapedontidae (Lydekker, 1885) Langer, Montefeltro, Hone, Whatley & Schultz, 2010
                                 |-- †Isalorhynchus genovefae Buffetaut, 1983 [=? Hyperodepedon Huxley, 1859 (Langer et al., 2000]
                                 `--o †Hyperdapedontinae (Lydekker, 1885) Chatterjee, 1969 sensu Langer & Schultz, 2000
                                    |-- †Teyumbaita sulcognathus (Azevedo & Schultz, 1987) Montefeltro, Langer & Schultz, 2010 [“Scaphonyx” sulcognathus Azevedo & Schultz, 1987]
                                    |-- †Otischalia elderae Hunt & Lucas, 1991
                                    `--o †Hyperodepedon Huxley, 1859 [Stenometopon Boulenger, 1903; Scaphonyx Woodward, 1907; Macrocephalosaurus Tupi-Caldas, 1933; Paradapedon Huene, 1938; Cephalonia Huene, 1942; Supradapedon Chatterjee, 1980] L.Trias. Eu. Ind. SAs. SAm.
                                       |?- †H. australis (Huene, 1926) [Scaphonyx australis Huene, 1926] (nomen dubium?)
                                       |?- †H. lotziana (Huene, 1942) [Cephalonia lotziana Huene, 1942] (nomen dubium?)
                                       |-- †H. huenei Langer & Schultz, 2000 [Scaphonyx fischeri Woodward, 1907 in partim] L.Trias. SAm.
                                       `--+-- †H. mariensis (Tupi-Caldas, 1933) L.Trias. SAm.
                                          |--+-- †H. huxleyi Lydekker, 1881 [Paradapedon huxleyi (Lydekker, 1881) Huene, 1938], L.Trias. Ind.
                                          |  `-- †H. gordoni Huxley, 1859, L.Trias. WEu.
                                          `--+?- †H. fischeri (Woodward, 1907) sensu Langer & Schultz, 2000 [Scaphonyx fischeri Woodward, 1907; Cephalonia; Cephalastron; Cephalastronius; Scaphonychimus] M. Trias. SA. [nomen dubium?]
                                             `-- †H. sanjuanensis (Sill, 1970) sensu Langer & Schultz, 2000 [Scaphonyx sanjuanensis Sill, 1970]

After Ezcurra, Montefeltro & Butler, 2016

<==o †Rhynchosauria
   |-- †Noteosuchus colletti
   |-- †Mesosuchus browni
   |-- †Howesia browni
   |-- †Eohyosaurus wolvaardti
   `--o †Rhynchosauridae
      |-- †Rhynchosaurus articeps
      `--+--o †Stenaulorhynchinae
         |  |-- “Mariante rhynchosaur”
         |  `-- †Stenaulorhynchys stockleyi
         `--+-- †Langeronyx brodiei
            `--+-- †Bentonyx sidensis
               `--+-- †Fodonyx spenceri
                  `--o †Hyperdapedontinae
                     |-- †Isalorhynchus genovefae
                     `--+-- †Teyumbaita sulcognathus
                        `-- †Hyperodepedon

Reference(s):

  • Ezcurra, M. D., Montefeltro, F. & Butler, R. J., 2016: The early evolution of rhynchosaurs.
    –Frontiers in Ecology and Evolution: Vol. 3, #142 [doi: 10.3389/fevo.2015.00142]

After Langer, Montefeltro, Hone, Whatley & Schultz, 2010

<==o †Rhynchosauria
   |-- †Rhynchosaurus articeps
   `--o †Hyperdapedontidae
      |--+-- “Mariante rhynchosaur”
      |  `-- †Stenaulorhynchys stockleyi
      |-- †Bentonyx sidensis
      `--+-- †Fodonyx spenceri
         `--o †Hyperdapedontinae
            |-- †Isalorhynchus genovefae
            `--+-- †Teyumbaita sulcognathus
               `-- †Hyperodepedon

Reference(s):

  • Langer, M. C., Montefeltro, F. C., Hone, D. E., Whatley, R. & Schultz, C. L., 2010: On Fodonyx spenceri and a New Rhynchosaur from the Middle Triassic of Devon.
    –Journal of Vertebrate Paleontology: Vol. 30, #6, pp. 1884-1888 [doi: 10.1080/02724634.2010.521901]

Reference(s):