suborder obsolete Crossopterygii Invalid as it is not Monophyletic, in its original form it included Polypterus with Coelocanthans and tetrapods to the exclusion of Dipnoi. In modern revisions it still Includes only Coelacanths and tetrapods, but excludes Dipnoi. As there is significant support for a Dipnotatrapodomorpha, this clade is invalid. PaleoDB:209228 true