Parent taxon: Neopterygii according to R. van der Laan 2019
See also Alvarado-Ortega and Espinosa-Arrubarrena 2008, Bartram 1975, Brito 2000, Brito et al. 2008, Carnevale and Godfrey 2018, Cavin et al. 2007, Cope 1887, Cope 1891, Ebert and Etches 2025, Grande 2010, Hall and Wolberg 1989, Hay 1902, Jordan 1963, Lauder and Liem 1983, Machado et al. 2013, Nelson 2006 and Nelson et al. 2016
Sister taxa: Ducanichthys, Frodoichthys, Gebrayelichthyidae, Gimlichthys, Ginglymodi, Guildayichthyidae, Holostei, Lombardinidae, Louwoichthyiformes, Luganoiiformes, Peltopleuriformes, Perleidiformes, Pholidopleuriformes, Placopleurus, Plesiofuro, Pycnodontiformes, Signeuxellidae, Sphaerodontidae, Venusichthyidae
Subtaxa: Allolepidotus Cipactlichthys Gigantodontidae Ionoscopiformes Isopholidae Ophiopsiformes Ophiopsiidae Panxianichthyiformes Parasemionotiformes Pholidophorus curionii Pholidophorus oblongus Pingolepidae Praesemionotidae Prosantichthys
Ecology: planktonic suspension feeder