Due to the only known fossil of Psilichthys is incomplete holotype specimen, its classification is discussed for years. It was originally described as a possibly palaeoniscidorchondrosteid.[2] It has also previously been referred to the familyBirgeriidae. Waldman (1971) denied interpretation as chondrosteid, considering the character that lacked scales which used to classify it as acipenseriform, is misidentification and it preserved some of scales. Waldman suggested that is likely to be a palaeoniscid that belongs to Coccolepidae, although due to preservation it is tentative.[3] It is not belong to birgeriid considering differences from Birgeria.[3][4] However, if identification as acipenseriform is true, it would be the only member of that group known from the southern hemisphere.[5][6]
^ abWaldman, M., 1971, A re-examination of Psilichthys selwyni Hall, from the Lower Cretaceous of Victoria: Proceedings of the Royal Society of Victoria 84:263–265
^Romano, C. & Brinkmann, W. (2009). "Reappraisal of the lower actinopterygian Birgeria stensioei ALDINGER, 1931 (Osteichthyes; Birgeriidae) from the Middle Triassic of Monte San Giorgio (Switzerland) and Besano (Italy)". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 252: 17–31. doi:10.1127/0077-7749/2009/0252-0017.
