Alternative spelling: Symbranchii
Parent taxon: Teleostei according to D. S. Jordan 1963
See also Jaekel 1911
Sister taxa: Acanthopteri, Acregoliath, Amphiuma nordica, Araripchthyiformes, Asiatolepis, Bathyclupeiformes, Catosteomi, Chongichthyidae, Chromides, Crossognathiformes, Discocephali, Dorsetichthyiformes, Elopocephalai, Euteleosteii, Gasterosteiformes, Gobioidea, Ichthyodectiformes, Jinanichthys, Jugulares, Lampriformes, Leptolepidiformes, Leucichthyops, Longdeichthys, Luisiella, Lyopomi, Malacopteri, Opisthomi, Osteoglossocephalai, Osteossomorpha, Paralycoptera, Pediculati, Percomorphacea, Pharyngognathi, Pholidophoriformes, Polymyxiomorpha, Scorpaeniformes, Stephanoberyciformes, Teleocephala, Teleosteorum, Todiltia, Tonghuaichthys, Tselfatiiformes, Xenopterygii, Ypsiloichthys
Subtaxa: Alabiformes Holostomi Ichthyocephalia
Ecology: