†family Synechodontidae Casier 1947 (elasmobranch)
Parent taxon: Euselachii according to G. R. Case 1978
Sister taxa: Acronemus, Hueneichthys, Hybodontida, Neoselachii, Orectoloboidei, Protacrodontoidea, Sphenacanthidae, Squatinoidei, Surcaudalus
Subtaxa: none
Ecology: nektonic carnivore