Brazilichthys is referred to its own family, Brazilichthyidae[3] (monotypy). Its evolutionary relationships to other genera are not well known. It was hypothesized that Brazilichthys could be closely related to the TriassicBirgeria,[4] though this was subsequently considered unlikely.[1]
^Romano, Carlo; Brinkmann, Winand (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 (1): 17–31. doi:10.1127/0077-7749/2009/0252-0017.