Perleidiformes are an extinct order of prehistoric ray-finned fish from the Triassic period^[1] Although numerous Triassic taxa have been referred to Perleidiformes, which ones should be included for it to form a monophyletic group is a matter of ongoing scientific debate.^[2][3][4]

Quick Facts Scientific classification, Families ...

Perleidiformes Temporal range: Triassic PreꞒ Ꞓ O S D C P T J K Pg N
Perleidus altolepis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Subclass:	Neopterygii
Order:	†Perleidiformes Berg, 1937
Families
†Cleithrolepididae †Cephaloxenidae †Platysiagidae †Polzbergiidae †Gabanellidae †Aethodontidae †Colobodontidae †Pseudobeaconiidae †Perleididae
Synonyms
Perleidida Polzbergiiformes Griffith 1977 Cephaloxeniformes Platysiagiformes Brough 1939 Platysiagida Fowler 1958

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• • Family †Cleithrolepididae Wade 1935 corrig. [Cleithrolepidae Wade 1935; Hydropessidae Hutchinson 1973]
    • Genus †Hydropessum Broom 1909
    • Genus †Cleithrolepidina Berg 1955
    • Genus †Cleithrolepis Egerton 1864
    • Genus †Dipteronotus Egerton 1864
  • Suborder †Cephaloxenoidei Lehman 1966
    • Family †Cephaloxenidae Brough 1939
      • Genus †Cephaloxenus Brough 1939
  • Suborder †Perleidoidei
    • Family †Platysiagidae Brough 1939 sensu Neuman & Mutter 2005
      • Genus †Caelatichthys Lombardo 2002
      • Genus †Helmolepis Stensiö 1932
      • Genus †Platysiagum Egerton 1872
    • Family †Polzbergiidae Griffin 1977
      • Genus †Luopingichthys Sun et al. 2009
      • Genus †Serrolepis Quenstedt 1852 ex Dames 1888
      • Genus †Ctenognathichthys Burgin 1992
      • Genus †Stoppania Lombardo, Rusconi & Tintori 2008
      • Genus †Polzbergia Griffith 1977
      • Genus †Felberia Lombardo & Tintori 2004
    • Family †Gabanellidae Tintori & Lombardo 1996
      • Genus †Gabanellia Tintori & Lombardo 1996
    • Family †Aetheodontidae Brough 1939
      • Genus †Aetheodontus Brough 1939
    • Family †Colobodontidae Andersson 1916 [Asterodontidae Jordan 1923]
      • Genus †Albertonia Gardiner 1966
      • Genus †Boreichthys Selezneva 1982
      • Genus †Cenchrodus von Meyer 1847
      • Genus †Chrotichthys Wade 1940
      • Genus †Crenilepis Dames 1888 [Crenilepoides Strand 1929]
      • Genus †Dollopterus Abel 1906 [Dolichopterus Compter 1891 non Hall 1859 non Murray 1870]
      • Genus †Engycolobodus Oertle 1927
      • Genus †Hemilopas von Meyer 1847
      • Genus †Manlietta Wade 1935
      • Genus †Meidiichthys Borough 1931
      • Genus †Meridensia Stensiö 1916
      • Genus †Nephrotus Meyer 1849 [Omphalodus Meyer 1847; Eupleurodus Gürich, 1884]
      • Genus †Pristisomus Woodward 1890
      • Genus †Procheirichthys Wade 1935
      • Genus †Zeuchthiscus Wade 1940
      • Genus †Colobodus Agassiz 1844 [Asterodon Münster, 1841]
    • Family †Pseudobeaconiidae López-Arbarello & Zavattieri 2008
      • Genus †Caminchaia Rusconi 1946a
      • Genus †Echentaia Rusconi 1946
      • Genus †Pasambaya Rusconi 1946a
      • Genus †Anatoia Rusconi 1946a
      • Genus †Pseudobeaconia Bordas 1944
    • Family †Perleididae Brough 1931 [Fuyuanperleididae Sun et al. 2012]
      • Genus †Altisolepis Mutter & Herzog 2004
      • Genus †Alvinia Sytchevskaya 1999 non Monterosato 1884
      • Genus †Chaohuperleidus Sun et al., 2013
      • Genus †Daninia Lombardo 2001
      • Genus †Diandongperleidus Geng et al. 2012
      • Genus †Endennia Lombardo & Brambillasca 2005
      • Genus †Fuyuanperleidus Geng et al. 2012
      • Genus †Luopingperleidus Geng et al. 2012
      • Genus †Megaperleidus Sytchevskaya 1999
      • Genus †Mendocinichthys Whitley 1953 [Mendocinia Bordas 1944 non Jensen-Haarup 1920]
      • Genus †Paraperleidus Zhao & Liu 2007
      • Genus †Peltoperleidus Bürgin et al. 1991
      • Genus †Plesioperleidus Su & Li 1983 sensu Tong et al. 2006 [Zhangina Liu 2002]
      • Genus †Perleidus De Alessandri 1910 sensu Lombardo et al. 2011