Pterophyllum Heckel [J. J.] 1840:334 Neut. Platax scalaris Cuvier 1831 (= Zeus scalaris Lichtenstein 1823). Type by monotypy. Not preoccupied (see Myers 1940:36 [ref. 3118]). Species scalaris as senior objective synonym from Myers [ref. 3118], not verified. •Valid as Pterophyllum Heckel 1840 -- (Kullander 1986:210 [ref. 12439], Kullander 1998:494 [ref. 23855], Farias et al. 1998:502 [ref. 23856], Kullander in Reis et al. 2003:641 [ref. 27061], Schindler 2003:73 [ref. 27489]). Current status: Valid as Pterophyllum Heckel 1840. Cichlidae: Cichlinae.