Autapomorphies of Brycon meeki:

1. Temporal fossa (13): (1> 0) well developed.Paralleled in node 300 and in Bryconexodon juruenae and Salminus brasiliensis .

2. Number of epurals (297): (0> 1) three. Paralleled in the Alestidae and in node 167.

Some trees:

3. Contact between frontals anteriorly to frontal fontanel (21): (1> 0) absent. (k11-14). Paralleled in node 167 and in Metynnis maculatus . Some trees: Paralleled in nodes 175 and 206.

4. Length of supraoccipital spine (53): (1> 0) extends posteriorly to, at least, middle length of neural complex of Weberian apparatus. (k11-14). Paralleled in the Serrasalmidae, in nodes 182 and 205, and in Piabucus melanostomus and Prochilodus lineatus . Some trees: Paralleled in Brycon orbignyanus .