robertsi, Hyphessobrycon Anonymous [Axelrod [H. R.]] 1958:76 [Tropical Fish Hobbyist v. 7 (no. 2); ref. 22778] Not available as above, no distinguishing features provided; as pointed out by Weitzman & Palmer 1997:226 [ref. 22743] and Weitzman & Palmer 1997:153 [ref. 24506], "Numerous subsequent references to H. robertsi in the aquarium literature appear to refer to H. bentosi and may have made the name H. robertsi available." See Zarske & Géry 1997:310 [ref. 23715]. •In the synonymy Hyphessobrycon bentosi Durbin 1908 -- (Lima & Malabarba in Reis et al. 2003:135 [ref. 27061]). •Unavailable name -- (Toledo-Piza et al. 2024:443 [ref. 40817]). •In the synonymy of Megalamphodus bentosi (Durbin 1908). Nomen Nudum. Current status: Synonym of Megalamphodus bentosi (Durbin 1908). Acestrorhamphidae: Megalamphodinae.