Of the 14 orders that compose Euselachii, 8 belong to the sharks, 6 to the rays, without an intermediate taxon separating sharks of rays.
For this reason, some authors have separated Euselachii in two:
super-order Selachimorpha corresponding to orders of sharks;
super-order Rajomorphii corresponding to the orders of rays, torpedoes, sawfish and guitar fish.

For those who do not recognize these two super-orders, Euselachii therefore has for synonyms Pleurotremata, Selachimorpha and Rajomorphii.
Of the 14 orders that compose Euselachii, 8 belong to the sharks, 6 to the rays, without an intermediate taxon separating sharks of rays. For this reason, some authors have separated Euselachii in two:
super-order Selachimorpha corresponding to orders of sharks;
super-order Rajomorphii corresponding to the orders of rays, torpedoes, sawfish and guitar fish.
For those who do not recognize these two super-orders, Euselachii therefore has for synonyms Pleurotremata, Selachimorpha and Rajomorphii.
Euselachii