Clade Halecomorphi Cope 1872
Parent taxon: Halecostomi according to J. S. Nelson 2006
See also Alvarado-Ortega and Espinosa-Arrubarrena 2008, Brito 2000, Carnevale and Godfrey 2018, Cavin et al. 2007, Cope 1887, Cope 1891, Hall and Wolberg 1989, Hay 1902, Jordan 1963, Machado et al. 2013 and Nelson et al. 2016
Sister taxa: Angolaichthys, Aphanepygus, Hulettia, Ligulelliformes
Subtaxa: Allolepidotus Cipactlichthys Ionoscopidae Ionoscopiformes Isopholidae Ophiopsiformes Ophiopsiidae Panxianichthyiformes Parasemionotiformes Pholidophorus curionii Pholidophorus oblongus Prosantichthys Sinamiidae