Autapomorphies of Creagrutus cf. taphorni:

1. Ventral extent of third infraorbital (64): (0> 1) not reaching horizontal arm of preopercle, at least anteriorly. Reversal of synapomorphy 2 of node 198. Paralleled in nodes 280 and 298 and in Aphyodite grammica, Axelrodia lindeae, and Bryconamericus rubropictus .

2. Length of medial bony ridge of opercle (170): (1> 0) 60% or greater than opercular length. Paralleled in the Serrasalmidae, in node 210, and in Astyanax abramis, Hoplias cf. malabaricus, and Roeboides microlepis . Some trees: Paralleled in Acestrorhynchus pantaneiro and Salminus brasiliensis .

3. Process of scapula forming anterior border of scapular foramen (244): (0> 1) absent. Paralleled in node 193 and in Aphyodite grammica, Deuterodon langei, Hoplias cf. malabaricus, Hyphessobrycon herbertaxelrodi, Leporinus striatus, Odontostilbe paraguayensis, and Thayeria obliqua.