After Coombs, Weishampel & Witmer, 1990, Weishampel & Witmer, 1990, Sereno, 1991, Keesey, 1996-2000, Carpenter, 2002, and Xu et al., 2006

<==o †Ornithischia Seeley, 1888 [Predentata Marsh] (bird-hipped dinosaurs; nokkasaurit, linnunlanteiset dinosaurit)
   |?- †Pisanosaurus mertii Casamiquela, 1967
   `==o †“Fabrosauridae” Galton, 1972 [paraphyletic grade of basal ornithischians]
      |-- †Eocursor parvus Butler, Smith & Norman, 2007
      |-- †Fabrosaurus australis Ginsburg, 1964 sensu Sereno, 1991 [Lesothosaurus diagnosticus Galton, 1978; Lesothosaurus diagnisticus Ferigolo & Langer, 2006: 3 (lapsus calami); Stormbergia dangershoeki Butler, 2005 sensu Knoll et al., 2009]
      |--o †Gongbusaurus Dong, Zhou, & Zhang, 1983
      |  |?- †G. shiyii Dong, Zhou, & Zhang, 1983
      |  `-- †G. wucaiwanensis
      |-- †Laquintasaura venezuelae Barrett, Butler, Mundil, Scheyer, Irmis & Sánchez-Villagra, 2014
      |?- †Stormbergia dangershoeki Butler, 2005 [= Lesothosaurus diagnosticus Galton, 1978 sensu Knoll et al., 2009]
      |-- †Xiaosaurus dashanpensis Dong & Tang, 1983; M.Jur. EAs.
      `--o †Genasauria Sereno, 1986
         |--o †Thyreophora Nopsca, 1915 (shield-carriers; kilpeäkantavat)
         |  |?- †Tatisaurus oehleri (Simmons, 1965) [Scelidosaurus oehleri Simmons, 1965]
         |  |-- †Scutellosaurus lawleri Colbert, 1981
         |  `--o Thyreophoroidea Nopsca, 1915 [Enoplosauria]
         |     |-- †Emausaurus ernsti Haubold, 1990
         |     `--o Eurypoda Sereno, 1986 [Stegosauria + Ankylosauria]
         |        |-- †Stegosauria Marsh, 1877 (stegosaurs; laattaselät)
         |        `--o †Ankylosauromorpha sensu Carpenter, 2001 (Armored-plated dinosaurs)
         |           |-- †Scelidosaurus harrisonii Owen, 1861
         |           `-- †Ankylosauria Osborn, 1923a (Armored-plated dinosaurs; panssariselät)
         `--+-- †Kulindadromeus zabaikalicus Godefroit, Sinitsa, Dhouailly, Bolotsky, Sizov, McNamara, Benton & Spagna, 2014
            `--o †Cerapoda Cooper, 1985 sensu Barrett et al., 2005 [Neornithischia sensu Sereno, 1996]
               |?- †Hexinlusaurus multidens (He & Cai, 1983) Barrett, Butler & Knoll, 2005 [Yandusaurus multidens He & Cai, 1983; Agilisaurus multidens (He & Cai) Peng, 1990; Othnielia multidens (He & Cai) Paul, 1996]; M.Jur. EAs.
               |?- †Micropachycephalosaurus hongtuyanensis Dong, 1978 sensu Butler & Zhao, 2009 [Cerapoda incertae sedis]
               |--o †Ornithopoda Marsh, 1881b sensu Han, Barrett, Butler & Xu, 2012 (bird-feet; linnunjalat)
               |  |--o †Jeholosauridae Han, Barrett, Butler & Xu, 2012
               |  |  |-- †Haya griva Makovicky, Kilbourne, Sadleir & Norell, 2011
               |  |  `--+-- †Jeholosaurus shangyuanensis Xu, Wang & You, 2000
               |  |     `-- †Changchunsaurus parvus Zan, Chen, Jin & Li, 2005
               |  `-- †Ornithopoda Marsh, 1881b sensu Sereno, 1986 (bird-feet; linnunjalat)
               `--+-- †Agilisaurus louderbacki Peng, 1992 [paraphyletic Fabrosauridae]
                  `--o †Heterodontosauriformes Xu, Forster, Clark & Mo, 2006
                     |?- †Heterodontosauridae Kuhn, 1966 [non Romer, 1966]
                     `--o †Marginocephalia Sereno, 1986 (marginal-skulled; rajakalloiset)
                        |-- †Pachycephalosauria (Sternberg, 1945)  Marya´nska & Osmólska, 1974 (thick-headed dinosaurs; paksupäät)
                        `-- †Ceratopsia Marsh, 1890 (horned dinosaurs; sarvinaamat)

Ornithischia incertae sedis:

Alocodon kuehnei Thulborn, 1973 [nomen dubium, a tooth-taxa]
    †Crosbysaurus harrisae Heckert, 2004; U.Trias. SWNA. [tooth-taxa]
    †Galtonia gibbidens (Cope, 1878) Hunt & Lucas, 1994 [Thecodontosaurus gibbidens Cope, 1878] U.Trias. SWNA. [tooth-taxa]
    †Krzyzanowskisaurus hunti (Heckert, 2002) Heckert, 2005 [Revueltosaurus hunti Heckert] U.Trias. SWNA. [tooth-taxa] [possibly jr. synon. of †Revueltosaurus callenderi Hunt, 1989 (Archosauria: Pseudosuchia: ?Suchia)]
    †Lucianosaurus wildi Hunt & Lucas, 1994; U.Trias. SWNA. [tooth-taxa]
    †Lusitanosaurus liasicus Lapparent & Zbyszewski, 1957
    †Pekinosaurus olseni Hunt & Lucas, 1994; U.Trias. SWNA. [tooth-taxa]
    †Phyllodon henkeli Thulborn, 1973
    †Protecovasaurus lucasi Heckert, 2004; U.Trias. SWNA. [tooth-taxa]
    †Taveirosaurus costai Antunes & Sigogneau-Russell, 1991 [tooth -taxa]
    †Technosaurus smalli Chattarjee, 1984; U.Trias. SWNA. [tooth-taxa]
    †Tecovasaurus murryi Hunt & Lucas, 1994; U.Trias. SWNA. [tooth-taxa]
    †Trimucrodon cuneatus Thulborn, 1973 [tooth -taxa]

Alternative phylogenies of Basal Ornithischians

After Godefroit, Sinitsa, Dhouailly, Bolotsky, Sizov, McNamara, Benton & Spagna, 2014 (based on matrix of Han et al., 2012

<==o †Ornithischia
   |-- †Pisanosaurus
   `--+-- †Heterodontosauridae
      `--+-- †Eocursor
         `--+-- †Lesothosaurus
            |--o †Thyreophora
            |  |-- †Scutellosaurus
            |  `--+-- †Emausaurus
            |     `--+-- †Scelidosaurus
            |        `--+-- †Stegosauria
            |           `-- †Ankylosauria
            `--o †Neornithischia
               |-- †Stormbergia
               `--+-- †Agilisaurus
                  `--+-- †Hexinlusaurus
                     `--+-- †Kulindadromeus
                        `--o †Cerapoda
                           |-- †Ornithopoda
                           `--o †Marginocephalia
                              |-- †Pachycephalosauria
                              `-- †Ceratopsia

Reference(s):

  • Godefroit, P., Sinitsa, S. M., Dhouailly, D., Bolotsky, Y. L., Sizov, A. V., McNamara, M. E., Benton, M. J. & Spagna, P., 2014: A Jurassic ornithischian dinosaur from Siberia with both feathers and scales.
    –Science: Vol. 345, #6195, pp. 451-455 [doi: 10.1126/science.1253351]
  • Saveliev, S. V. & Alifanov, V. R., 2014: A new type of skin derivatives in Ornithischian dinosaurs from the late Jurassic of Transbaikalia (Russia).
    –Doklady Biological Sciences: Vol. 456, #1, pp. 182-184 [doi: 10.1134/S0012496614030053]

After Han, Barrett, Butler & Xu, 2012

<==o †Ornithischia
   |-- †Pisanosaurus
   `--+-- †Lesothosaurus
      |-- †Eocursor
      |-- †Heterodontosauridae
      |--o †Thyreophora
      |  |-- †Scutellosaurus
      |  `--+-- †Emausaurus
      |     `--+-- †Scelidosaurus
      |        `--+-- †Stegosauria
      |           `-- †Ankylosauria
      `--o †Neornithischia
         |-- †Stormbergia
         `--+-- †Agilisaurus
            `--+-- †Hexinlusaurus
               `--+-- †Othnielosaurus
                  `--o †Cerapoda
                     |-- †Ornithopoda
                     `--o †Marginocephalia
                        |-- †Pachycephalosauria
                        `-- †Ceratopsia

Reference(s):

  • Han, F.-L., Barrett, P. M., Butler, R. J. & Xu, X., 2012: Postcranial Anatomy of Jeholosaurus shangyuanensis (Dinosauria, Ornithischia) from the Lower Cretaceous Yixian Formation of China.
    –Journal of Vertebrate Paleontology: Vol. 32, #6, pp. 1370-1395 [doi: 10.1080/02724634.2012.694385]

After Pol, Rauhut & Becerra, 2011

<==o †Ornithischia
   |-- †Pisanosaurus
   |-- †Echinodon
   `--+-- †Heterodontosauridae
      `--+-- †Eocursor
         `--o †Genasauria
            |-- †Thyreophora
            `--+-- †Lesothosaurus
               `--+-- †Stormbergia
                  `--+-- †Agilisaurus
                     `--+-- †Hexinlusaurus
                        `--+-- †Orodromeus
                           `-- †Cerapoda

Reference(s):

  • Pol, D., Rauhut, O. & Becerra, M., 2011: A Middle Jurassic heterodontosaurid dinosaur from Patagonia and the evolution of heterodontosaurids.
    –Naturwissenschaften: Vol. 98, #5, pp. 369-379 [doi: 10.1007/s00114-011-0780-5]

 

Reference(s):