Autapomorphies of Astyanax latens:

1. Abrupt decrease in size of dentary teeth (148): (0> 1) present. Paralleled in the Bryconops clade, in nodes 222, 255, and 299, and in Astyanax paris .

2. Number of gill rakers on first hypobranchial and ceratobranchial (195): (1> 0) 16 or more. Paralleled in nodes 177 and 183 and in Astyanax cf. rutilus, A. pelegrini, Hoplias cf. malabaricus, Hyphessobrycon socolofi, Moenkhausia dichroura, Parecbasis cyclolepis, Piaractus mesopotamicus, and Stichonodon insignis .