Pengornithidae is a group of early enantiornithines from the early Cretaceous Period of China, with the putative member Falcatakely possibly extending this clade's range into the Late Cretaceous of Madagascar,[2] and several putative pengornithids also hail from this formation.

[3] Specimens of these animals have been found both in the Huajiying Formation and Jiufotang Formation of Liaoning and Hebei provinces, dating from the Hauterivian age (130.7 million years ago) to the Aptian age (120 million years ago).

[5] Assuming Falcatakely is a pengornithid, it exhibits a rather novel cranial morphology compared to other enantiornitheans, having a toucan-like snout ending on small teeth.

[5] Protopteryx Elsornis Rapaxavis Iberomesornis Shanweiniao Longirostravis Boluochia Longipteryx Vescornis Otogornis Gobipteryx Eocathayornis Shenqiornis Eopengornis

Parapengornis Pengornis Neuquenornis Eoenantiornis Liaoningornis Eoalulavis Concornis Cathayornis The cladogram below was found by an analysis by Wang et al. in 2015, updated from a previous data set created by Jingmai O'Connor.