Possibly due to the fact that de Vis lacked flamingo material in his collection to compare the fossils to, he assigned the genus to the Ciconiidae, the storks.

The smaller species X. minor meanwhile is known from multiple remains of the humerus and tibiotarsus discovered in Pliocene to Pleistocene sediments of Lake Kanunka and the Lower Cooper Creek.

Xenorhynchopsis tibialis appears to have been limited to the Pleistocene and possibly died out when the inland lakes these birds depended on dried up, leading to the local extinction of flamingos in Australia.

All four species could be found in the sediments of Lower Cooper Creek, however due to them appearing in different localities, many of which lack precise information regarding their age, it is uncertain if they actually occurred alongside one another.

[1] According to Camens and Worthy, footprints found in the Tirari Formation may have been left by Xenorhynchopsis minor, as they appear to be too large to be attributed to P. proeses and too small to have belonged to X. tibialis.