Tropeognathine fossils have been found in Cretaceous deposits of Australia, Brazil, and Morocco.

[2] Tropeognathinae is defined as "the most inclusive clade containing Tropeognathus mesembrinus but not Coloborhynchus clavirostris or Anhanguera blittersdorffi."

All tropeognathines have relatively short teeth, with the height of the crown under 3 times the diameter of the tooth, as well as premaxillary crests that reach the tip of the rostrum.

[2] Mythungini, a stem-based clade of Australian tropeognathines, is defined as "the group consisting of Mythunga camara and all species more closely related to Mythunga than to Tropeognathus mesembrinus, Amblydectes crassidens or Siroccopteryx moroccensis."

[1] Coloborhynchinae Anhanguerinae Siroccopteryx Tropeognathus Amblydectes Ferrodraco Thapunngaka Mythunga