Autapomorphies of Bryconamericus exodon:

1. Rows of gill rakers on second ceratobranchial (193): (1> 0) one. Paralleled in nodes 238 and 253. Some trees: Paralleled in Axelrodia lindeae .

2. Color of caudal-fin lobes (345): (0> 3) both lobes dark brown or black. Paralleled in node 297.