Hyphessobrycon melanopleurus uruguayensis, Astyanacinus platensis, and Astyanax stenohalinus, published in a mimeographed paper by Messner in 1962 are considered available names. The subspecific name H. melanopleurus uruguayensis is recognized as a senior synonym of Cyanocharax macropinna Malabarba & Weitzman, 2003, and therefore referred to as Cyanocharax uruguayensis (Messner, 1962), new combination.
Astyanacinus platensis; Astyanax stenohalinus; Cyanocharax uruguayensis
