Cladistia

Cladistia is a clade of bony fishes whose only living members are the bichirs. Their major synapomorphies are a heterocercal tail in which the dorsal fin has independent rays, and a posteriorly elongated parasphenoid.
Cladistia are the earliest diverging branch of living Actinopterygii, sister group of Actinopteri, the group which includes all other living ray finned fish.
Aside from bichirs, other extinct fish groups thought to be members of the group include the Scanilepiformes, known from the Triassic period.
Taxonomy
Based on work done by Lund 2000
Order †Guildayichthyiformes Lund 2000
Family †Guildayichthyidae Lund 2000
Genus †Guildayichthys Lund 2000
Species †Guildayichthys carnegiei Lund 2000
Genus †Discoserra Lund 2000
Species †Discoserra pectinodon Lund 2000
Order Polypteriformes Bleeker 1859
Genus †Latinopollia Meunier and Gayet 1998
Species †Latinopollia suarezi (Meunier & Gayet 1996) Meunier & Gayet 1998
Genus †Dagetella Gayet & Meunier 1991
Species †Dagetella sudamericana Gayet & Meunier 1991
Genus †Bartschichthys Gayet & Meunier 1996 [Bartschia Gayet & Meunier 1996 non Rehder 1943]
Species †B. arnoulti (Gayet & Meunier 1996) [Bartschia arnoulti Gayet & Meunier 1996]
Species †B. napatensis Werner & Gayet 1997
Species †B. tubularis (Gayet & Meunier 1996) [Bartschia tubularis Gayet & Meunier 1996]
Genus †Sudania Werner & Gayet 1997
Species †S. gracilis Werner & Gayet 1997
Species †S. oblonga Werner & Gayet 1997
Genus †Saharichthys Werner & Gayet 1997
Species †S. nigeriensis (Gayet & Meunier 1996) [Sainthilairia nigeriensis Gayet & Meunier 1996]
Species †S. africanus (Gayet & Meunier 1996) [Sainthilairia africana Gayet & Meunier 1996]
Genus †Sainthilairia Gayet & Meunier 1996
Species †S. beccussiformis Gayet & Meunier 1996
Species †S. elongata Werner & Gayet 1997
Species †S. falciformis Gayet & Meunier 1996
Species †S. grandis Gayet & Meunier 1996
Species †S. intermedia Werner & Gayet 1997
Genus †Inbecetemia Werner & Gayet 1997
Species †I. torta (Gayet & Meunier 1996) [Sainthilairia torta Gayet & Meunier 1996]
Species †I. tortissima (Gayet & Meunier 1996) [Sainthilairia tortissima Gayet & Meunier 1996]
Genus †Nagaia Werner & Gayet 1997
Species †Nagaia extrema Werner & Gayet 1997
Family Polypteridae Lacépède 1803 sensu stricto
Genus †Bawitius Grandstaff et al. 2012
Species †Bawitius bartheli (Schaal 1984) Grandstaff et al. 2012 [Polypterus bartheli Schaal 1984]
Genus †Serenoichthys Dutheil 1999
Species †Serenoichthys kemkemensis Dutheil 1999
Genus Erpetoichthys Smith 1865 [Calamoichthys Smith 1866]
Species Erpetoichthys calabaricus
Genus Polypterus Lacepède 1803
Species Polypterus ansorgii Boulenger, 1910
Species Polypterus bichir Lacépède, 1803
Species Polypterus congicus Boulenger, 1898
Species Polypterus delhezi Boulenger, 1899
Species Polypterus endlicheri Heckel, 1847
Species Polypterus mokelembembe Schliewen & Schäfer, 2006
Species Polypterus ornatipinnis Boulenger, 1902
Species Polypterus palmas Ayres, 1850
Species Polypterus polli J. P. Gosse, 1988
Species Polypterus retropinnis Vaillant, 1899
Species Polypterus senegalus Cuvier, 1829
Species Polypterus teugelsi Britz, 2004
Species Polypterus weeksii Boulenger, 1898
References
Ray-finned fish taxonomy
Vertebrate subclasses