See text Crossognathiformes is an extinct order of ray-finned fish that lived from the Late Jurassic to the Eocene.

Its phylogenetic placement is disputed; some authors have recovered it as part of the teleost stem group,[1] while others place it in a basal position within crown group Teleostei.

[2] The oldest definitive crossognathiforms are known from the Late Jurassic (Oxfordian) of Chile.

They diversified afterwards and became a dominant group of marine fish throughout much of the Cretaceous.

The last surviving member was the pachyrhizodontid Platinx from the Eocene.