Autapomorphies of Aphyocharax dentatus:
1. Contact between ectopterygoid and anterodorsal region of quadrate (162): (0> 1) absent. Paralleled in nodes 184 and 242, and in Engraulisoma taeniatum, Prionobrama paraguayensis, and Stichonodon insignis . Some trees: Paralleled in the Cheirodontinae and in Microschemobrycon casiquiare .
2. Number of branched pelvic-fin rays (258): (0> 1) seven or more. Reversal of synapomorphy 3 of the Aphyocharacinae . Paralleled in Paragoniates alburnus .