After Borsuk-Bialynicka & Evans, 2009, Evans, 2009, and Evans & Borsuk-Bialynicka, 2009, and Ezcurra, Scheyer & Butler, 2014

<==o Sauria Gauthier, 1984 sensu Carroll, 1988
   |?- †Thalattosauriformes sensu Nicholls, 1999
   |--o Lepidosauromorpha Gauthier, 1984 sensu Gauthier, Estes & deQueiroz, 1988
   |  |?- †Sauropterygia (sauropterygians, plesiosaur-like diapsids; joutsenliskomaiset matelijat)
   |  `--+--o †Marmoretta Evans, 1991
   |     |  |?- †M. sp. [Portugal]
   |     |  `-- †M. oxoniensis Evans, 1991
   |     `--+-- †Sophineta cracoviensis Evans & Borsuk-Bialynicka, 2009
   |        `-- Lepidosauriformes Gauthier, Estes & deQueiroz, 1988 (lepidosaurs, lizard-like diapsids; liskomaiset matelijat)
   `--o Archosauromorpha von Huene, 1946 sensu Benton, 1985 [alternative phylogeny of Archosauromorpha after Sues, 2003]
      |--o †Protorosauria Huxley, 1871 sensu Ezcurra, Scheyer & Butler, 2014
      |  |--o †Protorosauridae Lydekker, 1888
      |  |  |-- †Aenigmastropheus parringtoni Ezcurra, Scheyer & Butler, 2014
      |  |  |-- †Czatkowiella harae Borsuk-Bialynicka & Evans, 2009
      |  |  `-- †Protorosaurus speneri Meyer, 1830
      |  `--o †Tanystropheidae Gervais, 1858
      |     |-- †Macrocnemus basanii (Nopcsa, 1930) [Macrochemus; Macrocnemus bassanni Nopcsa, 1930]
      |     `--o †Tanystropheus Meyer, 1855
      |        |-- †T. meridensis
      |        |-- †T. longobardicus
      |        `-- †T. conspicuus Meyer, 1855
      `--o Crocopoda Ezcurra, 2016
         |--+?- †Teraterpeton hrynewichorum Sues, 2003 [Teraterpetonidae Sues, 2003]
         |  `-- †Trilophosauria Gregory, 1945 sensu Romer, 1956
         `--+-- †Rhynchosauria Osborn, 1903
            `--+--o †Prolacertidae Parrington, 1935 [Prolacertiformes]
               |  |?- †Kadimakara australiensis Bartholomai, 1979
               |  |?- †Pamelaria dolichotrachela K. Sen, 2003
               |  `-- †Prolacerta broomi Parrington, 1935
               `-- Archosauriformes Gauthier, 1986 (arkosaurimaiset matelijat; archosaur-like diapsids)

Alternative phylogenies of Sauria:

After Ezcurra, 2016 (fig. 48

<==o Sauria
   |-- †Choristodera
   |-- Lepidosauromorpha
   `--o Archosauromorpha
      |-- †Aenigmastropheus
      `--+-- †Protorosaurus
         `--+--+-- †Jesairosaurus
            |  `-- †Tanystropheidae
            `--o Crocopoda
               |--o †Allokotosauria
               |  |-- †Pamelaria
               |  `--+-- †Azendohsaurus
               |     `-- †Trilophosauridae
               `--+-- †Boreopricea
                  `--+--o †Prolacertidae
                     |  |-- †Kadimakara
                     |  `-- †Prolacerta
                     `--+-- †Tasmaniosaurus
                        `-- Archosauriformes
               

References:

  • Ezcurra, M. D., 2016: The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms.
    –PeerJ: Vol. 4, pp. e1778 (1-385) [doi: 10.7717/peerj.1778]

After Nesbitt, Flynn, Pritchard, Parrish, Ranivoharimanana & Wyss, 2015

<==o Sauria
   |-- Lepidosauromorpha
   `--o Archosauromorpha
      |-- †Protorosaurus
      `--+--+-- †Macrocnemus
         |  `--+--+-- †Langobardisaurus
         |     |  `-- †Tanytrachelos
         |     `--+-- †Amotosaurus
         |        `-- †Tanystropheus 
         `--+-- †Rhynchosauria
            `--+--o †Allokotosauria
               |  |-- †Pamelaria
               |  `--+--o †Azendohsauridae
               |     |  `-- †Azendohsaurus
               |     `--o †Trilophosauridae
               |        |-- †Teraterpeton
               |        `--+-- †Trilophosaurus buettneri
               |           `--+-- †Trilophosaurus jacobsi
               |              `-- †Spinosuchus caseanus
               `--+-- †Prolacerta
                  `-- Archosauriformes
               

References:

  • Nesbitt, S. J., Flynn, J. J., Pritchard, A. C., Parrish, J. M., Ranivoharimanana, L. & Wyss, A. R., 2015: Postcranial Osteology of Azendohsaurus madagaskarensis (?Middle to Upper Triassic, Isalo Group, Madagascar) and its Systematic Position Among Stem Archosaur Reptiles.
    –Bulletin of the American Museum of Natural History: Vol. pp. 1-126 [doi: 10.1206/amnb-899-00-1-126.1]

After Schoch & Sues, 2015

<==o Sauria
   |--+-- †Choristodera
   |  `--+-- †Prolacerta
   |      `--+-- Archosauriformes
   |         `--+-- †Trilophosaurus
   |            `-- †Rhynchosauria
   `--+--+-- †Kuehneosauridae
      |  `--+-- Rhynchocephalia
      |     `-- Squamata
      `--+--+-- †Eusauropterygia
         |  `--+-- †Sinosaurosphargis
         |     `--+-- †Cyamodus
         |        `-- †Placodus
         `--o Pan-Testudinata
            |-- †Eunotosaurus
            `--+-- †Pappochelys
               `--+-- †Odontochelys
                  `-- Testudines

References:

  • Schoch, R. R. & Sues, H.-D., 2015: A Middle Triassic stem-turtle and the evolution of the turtle body plan.
    –Nature: in press [doi: 10.1038/nature14472]

After Motani, Jiang, Chen, Tintori, Rieppel, Ji & Huang, 2014

<==o Sauria
   |--+--+-- †Helveticosaurus
   |  |  `-- †Choristodera
   |  `--o Lepidosauriformes
   |     |-- †Coelurosauravus
   |     `--+-- †Sophineta
   |        `--+--+-- †Pamelina
   |           |  `-- †Kuehneosauridae
   |           `--+-- Rhynchocephalia
   |              `-- Squamata
   `--+--+--+-- †Tanystropheus
      |  |  `-- †Macrocnemus
      |  `--+-- †Prolacerta
      |     `--+-- †Trilophosaurus
      |        `--+-- †Rhynchosauria
      |           `-- Archosauriformes
      `--+-- †Thalattosauriformes
         `--+-- †Wumengosaurus
            |-- †Ichthyosauromorpha
            `--o †Sauropterygia
               |--+-- †Largocephalosaurus
               |  `-- †Sinosaurosphargis
               `--+-- †Placodus
                  |-- †Pachypleurosauroidea
                  `--o †Eusauropterygia
                     |-- †Nothosauroidea
                     `-- †Pistosauroidea

Reference(s):

  • Motani, R., Jiang, D.-Y., Chen, G.-B., Tintori, A., Rieppel, O., Ji, C. & Huang, J.-D., 2014: A basal ichthyosauriform with a short snout from the Lower Triassic of China.
    –Nature: in press [doi: 10.1038/nature13866]

After Chen, Motani, Cheng, Jiang & Rieppel, 2014b

<==o Sauria
   |--o Archosauromorpha
   |  |-- †Choristodera
   |  `--+--+-- †Prolacerta
   |     |  `--+-- †Tanystropheus
   |     |     `-- †Macrocnemus
   |     `--+-- †Trilophosaurus
   |        `--+-- †Rhynchosauria
   |           `-- Archosauriformes
   `--o Lepidosauromorpha
      |--o Lepidosauriformes
      |  |-- †Helveticosaurus
      |  `--+--+-- †Pamelina
      |     |  `-- †Kuehneosauridae
      |     `--+-- Rhynchocephalia
      |        `-- Squamata
      `--o †Sauropterygia
         |--+-- †Largocephalosaurus
         |  `-- †Sinosaurosphargis
         `--+-- †Placodus
            `--+-- †Pachypleurosauroidea
               `--o †Eusauropterygia
                  |-- †Nothosauroidea
                  `-- †Pistosauroidea

Reference(s):

  • Chen, X.-h., Motani, R., Cheng, L., Jiang, D.-y. & Rieppel, O., 2014b: The Enigmatic Marine Reptile Nanchangosaurus from the Lower Triassic of Hubei, China and the Phylogenetic Affinities of Hupehsuchia.
    –Plos One: Vol. 9, #7, pp. e102361 (1-13) [doi: 10.1371/journal.pone.0102361]

After Ezcurra, Scheyer & Butler, 2014

<==o Sauria
   |--o Lepidosauromorpha
   |  |-- †Paliguana
   |  |-- Rhynchocephalia
   |  `-- Squamata
   `--o Archosauromorpha
      |--o †Protorosauria s.s.
      |  |--o †Protorosauridae
      |  |  |-- †Aenigmastropheus
      |  |  `-- †Protorosaurus
      |  `--o †Tanystropheidae
      |     |-- †Tanystropheus
      |     `-- †Macrocnemus
      `--+--o †Trilophosauria
         |  `-- †Trilophosaurus
         `--+--o †Rhynchosauria
            |  |-- †Noteosuchus
            |  |-- †Mesosuchus
            |  `-- †Howesia
            `--+-- †Prolacerta
               `-- Archosauriformes

Reference(s):

  • Ezcurra, M. D., Scheyer, T. M. & Butler, R. J., 2014: The Origin and Early Evolution of Sauria: Reassessing the Permian Saurian Fossil Record and the Timing of the Crocodile-Lizard Divergence.
    –Plos One: Vol. 9, #2, pp. e89165 [doi: 10.1371/journal.pone.0089165]

After Borsuk-Bialynicka & Evans, 2009, Evans, 2009, and Evans & Borsuk-Bialynicka, 2009

<==o Sauria
   |--o Lepidosauromorpha
   |  |--+-- †Drepanosauridae
   |  |  `--o †Kuehneosauridae
   |  |     |-- †Pamelina
   |  |     `--+-- †Kuehneosaurus
   |  |        `-- †Icarosaurus
   |  `--o Lepidosauriformes
   |     |-- †Marmoretta
   |     `--+-- †Sophineta
   |        `--o Lepidosauria
   |           |-- Rhynchocephalia
   |           `-- Squamata
   `--+--+-- †Czatkowiella
      |  `-- †Protorosaurus
      `--+-- †Coelurosauravus
         `--+-- Archosauromorpha
            |-- †Choristodera
            `--+-- †Thalattosauriformes
               `--+-- †Ichthyosauromorpha
                  `--+-- †Sauropterygia
                     `-- Testudinata

  

Reference(s):

  • Borsuk-Bialynicka, M. & Evans, S. E., 2009: A long-necked archosauromorph from the Early Triassic of Poland.
    in Borsuk-Bialynicka, M. & Evans, S. E., (eds.) 2009: Early Triassic vertebrate assemblage from karst deposits at Czatkowice, Poland.
    –Palaeontologia Polonica: Vol. 65, pp. 203-234
  • Evans, S. E., 2009: An early kuehneosaurid reptile (Reptilia: Diapsida) from the Early Triassic of Poland.
    in Borsuk-Bialynicka, M. & Evans, S. E., (eds.) 2009: Early Triassic vertebrate assemblage from karst deposits at Czatkowice, Poland.
    –Palaeontologia Polonica: Vol. 65, pp. 145-178
  • Evans, S.E. & Borsuk-Bialynicka, M. 2009: A small lepidosauromorph reptile from the Early Triassic of Poland.
    in Borsuk-Bialynicka, M. & Evans, S. E., (eds.) 2009: Early Triassic vertebrate assemblage from karst deposits at Czatkowice, Poland.
    –Palaeontologia Polonica: Vol. 65, pp. 179–202

After Gottmann-Quesada & Sander, 2009

<==o Sauria
   |--o Lepidosauromorpha
   |  |-- Rhynchocephalia
   |  `-- Squamata
   `--+-- †Choristodera
      `--o Archosauromorpha
         |--+-- †Protorosaurus
         |  `-- †Megalancosaurus
         `--+--o †Tanystropheidae
            |  |-- †Macrocnemus
            |  `-- †Tanystropheus
            `--+--+-- †Trilophosaurus
               |  `-- †Rhynchosauria
               `--+-- †Pamelaria
                  `--+-- †Prolacerta
                     `-- Archosauriformes

Reference(s):

  • Gottmann-Quesada, A. & Sander, P. M., 2009: A redescription of the early archosauromorph Protorosaurus speneri Meyer,1832, and its phylogenetic relationships.
    –Palaeontographica Abteilung A: Vol. 287, #4-6, pp. 123-220

After Jalil, 1997

<==o Diapsida
   |-- Petrolacosaurus
   `--+-- Youngina
      `--o Sauria
         |--o Lepidosauromorpha
         |  |-- Sphenodontida
         |  `-- Squamata
         `--o Archosauromorpha
            |-- †Choristodera
            `--+-- †Rhynchosauria
               `--+-- †Trilophosaurus
                  `--+-- †Prolacertiformes
                     `-- Archosauriformes

After Rieppel & deBraga, 1996, deBraga & Rieppel, 1997, Gao & Fox, 1998, Rieppel, 2000, and Zardoya & Meyer, 2001

<==o Sauria
   |?- †Thalattosauriformes
   |--o Lepidosauromorpha
   |  |-- †Acerosodontosaurus
   |  |-- Lepidosauriformes
   |  `--+?- Testudinata
   |     `-- †Sauropterygia
   `--o Archosauromorpha
      |?- Testudinata
      |--+-- Archosauriformes
      |  `--+-- †Protorosauria
      |     `?- †Choristodera
      `--+-- †Rhynchosauria
         `--+?- †Teraterpeton
            `-- †Trilophosauria

Note:

Some recent phylogenetic analysis based on both morphology and genetics have given a result, in which turtles are derived diapsids, either a sistergroup of Archosauria (Zardoya & Meyer 2001) or Sauropterygia (Rieppel & deBraga, 1996, deBraga & Rieppel, 1997).

After Carroll, 1988

<==o Sauria
   |?- †Thalattosauriformes
   |--o Lepidosauromorpha
   |  |?- †Marmoretta
   |  |-- †Acerosodontosaurus
   |  |?- †Sauropterygia
   |  `-- Lepidosauriformes
   `--o Archosauromorpha
      |--+-- †Protorosauria
      |  `-- Archosauriformes
      `--+-- †Rhynchosauria
         `-- †Trilophosauria

Reference(s):