†Ectasis Jordan and Gilbert 1919 (ray-finned fish)
Parent taxon: Elopiformes according to J. J. Sepkoski 2002
Sister taxa: Albuloidei, Anaethalion, Antofagastaichthys, Carsothrissops, Coryphaenopsis, Davichthys, Eichstaettia, Elopidae, Elopoidei, Flindersichthys, Lyrolepis, Megalopidae, Ostariostoma, Phyllodontidae, Protostomias, Pterothrissidae, Tachynectes
Subtaxa: none
Ecology: nektonic carnivore