marmoratus, Rhamphichthys Castelnau [F. L.] 1855:86, Pl. 46 (fig. 2) [Animaux nouveaux or rares v. 2; ref. 766] Rio Araguay, Brazil. Holotype (unique): MNHN 0000-3959 (poor condition). Type catalog: Bertin 1948:43 [ref. 19577], Ferraris et al. 2017:[28] [ref. 35236]. •Valid as Rhamphichthys marmoratus Castelnau 1855 -- (Mago-Leccia 1994:41 [ref. 21320], Triques 1999:1 [ref. 24281], Albert 2001:124 [ref. 25614], Ferraris in Reis et al. 2003:493 [ref. 27061], de Santana & Crampton 2011:1155 [ref. 31643], Barriga Salazar 2014:116 [ref. 35745] as cf. marmoratus, Ramos et al. 2014:4 [ref. 35321], Sarmiento et al. 2014:108, 188 [ref. 35004], Carvalho & Albert 2015:40 [ref. 33681], DoNascimiento et al. 2017:66 [ref. 35633], Ochoa et al. 2020:64 [ref. 37781]). •Synonym of Rhamphichthys pantherinus Castelnau 1855 -- (Ferraris et al. 2017:[28] [ref. 35236], Carvalho & Albert 2023:43 [ref. 40654]). Current status: Synonym of Rhamphichthys pantherinus Castelnau 1855. Rhamphichthyidae. Habitat: freshwater.